SR No. Particulars
S&T-Alarm001 Automatic Night Lamp with morning alarm
  This circuit serves dual purpose, depending upon intensity of light rays detected. One part of the circuit automatically detects darkness to switch ‘ON’ a white bright LED which acts as night lamp. Its another part senses daylight to switch on a melodious music in the morning. No external DC power supply is required,as the circuit operates on direct AC power supply line. But , provision for battery backup is provided to power the circuit in case of mains failure.
S&T-Alarm002 Burglar Alarm (EP-3)
  This circuit sounds a loud alarm in the case of an unauthorised entry. Wire loop gets broken whenever such an attempt is made.
S&T-Alarm003 Fire Alarm (9301)
  This fire alarm uses a DR25 diode as sensor to sense fire and activate a loud alarm. 
S&T-Alarm004 Intruder Alarm
  This circuit automatically activates a loud alarm whenever any unauthorized entry is attempted. To reset the circuit, there is no need to replace the broken wire or to turn OFF the unit, as is the case with other security alarms. The alarm can be turned OFF just by a simple flick of a switch.The unit power on Identification by LED use also provided here forbetter monitoring.
S&T-Alarm005 Knock Alarm (0211)
  This circuit converts knock on door, car’s dashboard, drawer, etc into a loud alarm using a loudspeaker. It can also be used to warn you of any unauthorised entry during night time, if installed at your doorstep.
S&T-Alarm006 Power failure resumption alarm
  This circuit sounds an alarm whenever AC mains fails or resumes. It can be easily installed where you want to monitor the status of the mains supply.
S&T-Alarm007 Power Supply Failure Alarm (0107)
  This circuit indicates power supply failure by sounding a buzzer. No external DC supply is required and power-on condition is indicated by an LED. Time duration can be varied with little modifications.
S&T-Alarm008 Smoke Alarm (0112)
  This smoke detector employs a photo interrupter module that activates an audio alarm via a loudspeaker. The sensitivity can be easily adjusted by varying the preset. 
S&T-Alarm009 Fire Alarm (9V)
  Here is a simple fire alarm circuit build around 555 timer IC a reverse biased germanium diode DR 25 is used as a heat sensor.
S&T-Alarm010 Musical Siren Alarm (3V)
  This is musical siren without using IC operated by 2 transistor.
S&T-Alarm011 4 Led Water Level Indicator with Alarm(6V)(New)(CD 4066)
S&T-Alarm012 Musical Buglar Alarm / Doorbell (LDR Operated ) (3V)
  This circuit can operate as a light activated burglar alarm by the addition of preset and LDR.
S&T-Alarm013 Stop Thief (Buglar Alarm for Car ) (12V)
  This is simple circuit designed for car which protect your car from thief's with engine trouble.
S&T-Alarm014 Molestation Alarm (9V)
S&T-Alarm015 Fridge Alarm (12 V)
  This is simple LDR circuit designed for Fridge or Freezer which give alarms or sound when your door of fridge are not properly closed.
S&T-Alarm016 Musical Visitor's / Intruder Alarm (3V)
  It is simple circuit to monitoring intruders by using proximity magnetic switches.
S&T-Alarm017 Infrared INT Alarm (Long Range) (12V)
S&T-Alarm018 Knock / Earth Quake Alarm (9V)(New)
S&T-Alarm019 Smoke Alarm (NE 555)
S&T-Alarm020 Door Opening Alarm (New)
S&T-Auto001 Electronic Auto Dipper
  While driving at night, the high beam of head light lamp of vehicle approaching from opposite direction causes the problem of glare for both the drivers. This circuit solves the problem by making the dipper action automatic. As soon as it senses the light  rays coming from opposite direction it automatically turns lamps from High to Low intensity.
S&T-Auto002 4 Sound Car Reverse Horn (UM 3561) 3V
S&T-Auto003 Electronics Car Horn ( 810 + 555 ) ( 6 - 18 V ) 
  This is a simple & at low cost project designed for car using TBA 810+555 chip.
S&T-Auto004 Car Reverse Horn  (UM 66T / L)  (12V )
  This is a easy project designed for Car Reverse Horn.
S&T-Auto005 Multitune Car Reverse Horn (12V) (UM3482)
  Produce 12 different tunes for Reverse Horn.
S&T-Auto006 Scooter Brake Horn ( UM 66T/L )
  This circuit using UM66 melodious warning Brake Horn.
S&T-Auto007 Brake Light Monitor (12V)
  This tiny circuit keeps watch on brake indicator
S&T-AV001 Condenser MIC Amplifier (EP-7)
  Mic sound amplification with both fixed and variable outputs can be obtained using this kit. The two-stage amplifier is capable of providing sufficient gain to pick up even the slightest whisper.
S&T-AV002 VHF/UHF Modulator (12v-15v)(7805)
  This circuit will modulate a video signal into an R.F. carrier to give a signal that may be fed direct to the aerial socket of a VHF or UHF TV.
S&T-AV003 Multi Melody Generator with Instrumental Effect (0606)
  This versatile melody generator is capable of generating various English and Hindi version melodies using UM3481A and WR630173 tone generator respectively. Instrumental effects can also be produced with the same circuit.
S&T-AV004 Video Amplifier (12V)(7812)
  Universal Amplifier and distributor for video signal.
S&T-AV005 Three Octave Organ (EP-4)
  Organ is a musical keyboard instrument that produces a wide range of sounds at different volumes. This circuit resembles the working of organ by electronically producing 12 musical notes. This electronic organ is designed to produce notes in high, medium and low octaves,Selection of different octaves is done by switches S1 and S2.
S&T-AV006 Video Distribution Amplifier (12V)
  This circuit provide very high bandwidth up to 510MHz & Overall Gain of 8 to 10db.
S&T-AV007 3D Surround Sound System
  This is a novel project for hobbyist interested in 2-channel surround sound systems.An NJM2702D 3D surround audio processor is used here,which generates 3-dimension surround sound effect using two loud speakers only.
S&T-AV008 Voice Recording and playback (0407)
  This circuit enables to record a single message of upto 60 seconds duration or upto eight different messages of 7.5 sec duartion each. In playback mode the circuit plays recorded message either randomally or in sequential manner. It uses Voice Processor IC as main unit.
S&T-AV009 Electronic Harmonium  ( 9V )
  This is simple Harmonium using 555 IC,which gives 15 different music.
S&T-AV010 3 Gun Sound Generator  (UM 3562) (3V)
  This circuit uses 8 pin CMOS IC.It produces 3 different Gun sound.
S&T-AV011 Steam Engine with Whistle Sound (New)
S&T-AV012 Dancing Light / Sound Level Indicator (5-12 V )
  This simple circuit appeal for stereo system or Cassette Plyer on Sound level indicator.
S&T-AV013 20sec Voice Recording (6V) (APR9301)
S&T-AV014 60 Sec Voice Rec Message (6V) (APR9600)
  A re-recordable voice chip with non-colatile memory gives to store 1/4/8 voice msg in single chip with individual trigger & no batt backup.
S&T-AV015 8 Minute Voice Recording & Play Back (Message Box)
S&T-AV016 16 Minute Voice Recording & Play Back (Message Box)
S&T-AV017 120 Sec. Message Recorder (ISD 25120) (New)
S&T-AV018 Low Cost Audio Frequency Oscillator (9V) (New) (NE555)
S&T-Bell001 Automated School Bell (0410)
  The Circuit is useful for the Educational Institutes etc. This circuit provides an automatic alarm 8 times after an interval of 45 minutes each. and after 4 intervals provides lunch breaks for 30 minutes.
S&T-Bell002 Multi switch Doorbell with Indicators (0304)
  In a home with too many doors it becomes difficult to ascertain as to which door a visitor is standing just by hearing doorbell. Using a monitoring panel with indicators, this circuit is capable of solving this particular problem by indicating the door number.In addition to that, buzzer also is activated each time any switch is passed. With upto four switches available, circuit is able of monitoring four different doors.
S&T-Bell003 Musical Door Bell (with memory)
  This Doorbell produces a pleasant musical tune. The bell rings only for time period that you have set. A single melodious tune is heard whenever a push-to-on switch is pressed. The preset time can be varied easily.
S&T-Bell004 Musical touch Bell
  This musical bell operates just by the touch of your fingertip, obviating the need for a mechanical switch. Useful in homes and offices, it can operate off a single pencil cell. 
S&T-Bell005 Parrot Sounding AC Door Bell
S&T-Bell006 Remote Operated Musical Bell (0310)
  It uses any TV remote control to operate a 12-tone musical bell. This Infra-Red (IR) receiver unit is capable of responding to IR rays transmitted from any TV, VCR, VCD or CD player remote. When any of the buttons on the remote is pressed, the receiver detects it as pulse through its own IR sensor and plays one musical tone. The approximate range of the circuit is 10 meters.
S&T-Bell007 Two door Door Bell (0006)
  This doorbell gives two different tones: one of a lower frequency and the other of a much higher frequency. Separate switches can be mounted at two separate doors at the same floor level.
S&T-Bell008 Bird bell (mains) (230VAC) (with cabinet )  
  This circuit produce the bird chirping sound on mains trigger.(230AC)
S&T-Bell009 Bird bell  ( 9V to 12 V )
  This is a simple oscillator circuit producing chirping sound with single NPN tranisistor
S&T-Bell010 12 / 16 Tune musical bel (CIC 4822 ) (3V)( with cabinet)
  This is very compact 12/16 different tune door bells.
S&T-Bell011 Touch control musical bell (3V) (with cabinet )
  This circuit is popular musical bell,which gives different tunes of feather touch.
S&T-Bell012 16 Tune old hindi song bell (3V)(with Cabinet)
  A 16 Old Hindi Song tunes in rapid choice.
S&T-Bell013 25 Tune musical bell (RTS 993) (3 V) (with cabinet)
  This 25 tune English song with choice of lates doorbell technology will never ignore by anybody.
S&T-Bell014 K.D.K / please open the door  (OD - 02 ) Bell (3V) (W/C)
  This circuit is very simple & at low cost voice doorbell.
S&T-FM001 Cordless FM MIC (9605)
  The voice at condenser microphone can be listened through a standard FM receiver using this circuit. The range of this FM transmitter can be easily enhanced with little modifications.
S&T-FM002 FM Booster (0202)
  FM booster can be between your FM reciever and the antenna to listen to distant commercil FM stations clearly.
S&T-FM003 Long-Range FM Transmitter (9912)
  The high-power output obtained using a power amplifier stage allows a range of about 2 km for this FM transmitter. Reasonable good signal quality and strength are possible with little adjustments.
S&T-FM004 Quality FM Transmitter (0408)
  The digital like sound quality that FM offers is the reason that many people prefer to have their own transmitting station in FM band. This quality FM transmitter can transmit chosen music in FM band. To receive its signals, any conventional FM radio receivers can be used.Without compllicating the functionality,this circuit transmits the signals just by using discrete components.It provides an easy wau to transmit less distorted,low noise music with in a range of about 200 meters.
S&T-FM005 Wireless TV Headphone (0303)
  As most of TVs nowadays come equipped with audio in/out and video in/out RCA sockets. Connect audio output (headphone socket) of your TV to this circuit to transmit the sound of TV as FM signals. Using a portable FM receiver with headphone, watch your favorite TV program without distrubing others.
S&T-FM006 Fm Transmitter (9V)
  You can hear your voice in FM receiver kept at distance tuned in FM Frequency.
S&T-FM007 FM Transmitter 300 Meter (9V)(New)
S&T-FM008 FM Transmitter 2 K.Meter (9V)(New)
S&T-FM009 FM Transmitter 3 K.Meter (9V)(New)
S&T-FM010 Phone to FM Listening Bug (New)
S&T-Game001 Digi Teacher (EP-9)
  Now a days, the digital electronic techniques are employed to number of electronic devices and are applicable in diverse fields such as automobiles, electrical appliances, instrumentation and control equipments. Acting as Truth Table evaluator cum electronic learner circuit, this kit gives hands on practice for learning and understanding digital design basics.It displays the output using LEDs.
S&T-Game002 Digital Dice (0510)
  The digital electronic dice circuit acts like a normal dice and uses four different logic gate combination to bring out the six faces of the dice. Seven LEDs are suitably positioned on the board. When you place your finger on the touch plate, the LEDs wil glows.
S&T-Game003 School / College Quiz Buzzer
  This audio-visualquiz buzzer circuit given here can be used for up to eight players.It uese IC 74LS373 and a few passive components.
S&T-Game004 Griposcope (3-9V)
  Can also be used as a lie Detector.
S&T-Game005 Two In One Electronic Games (9 V )
  It incorporated two facilative games gambling & Indoor Cricket.
S&T-Game006 Quiz Monitor (4 Channel) 12V (New) (CD 4012+4013)
S&T-Game007 Electronic Roulette Wheel With 2 Digit (9V) (New) (CD 4033)
S&T-Game008 Electronic Decision Maker (New) (CD 4046)
S&T-Indicator001 Battery Low Indicator
S&T-Indicator002 Blown Fuse Indicator (0004)
  Green LED glows in normal condition, while a blown fuse is indicated by a red LED as well as an audio alarm.
S&T-Indicator003 Fastest Finger First Indicator (0112)
  Useful in quiz and game shows, this device indicates the fastest player’s designation number along with alarm sound, locking other contestant buttons.
S&T-Indicator004 Numeric Water Level Indicator with Display
S&T-Indicator005 Power Failure Indicator (Ep-16)
  The power supply failure and blown fuse condition both are indicated by sounding an alarm using a loudspeaker.
S&T-Indicator006 Smart Fluid Level Indicator (0001)
  This 7-segment display displays fluid level in meaningful English letters as E for Empty, L for Low, H for Half, A for Above Average, and F for Full.
S&T-Indicator007 Water level Indicator (9702)
  This simple and easy-to-install circuit gives both visual and aural indication when the water tank is full. You need to fit the probes at the desired water level in water tank. 
S&T-Indicator008 Bathful Indicator (5 V)
  This low cost solution for non wastage of water which alerts you by active buzzer when water level is reach.
S&T-Indicator009 Heart Bit Monitor (9V)(New)(LM 386)
S&T-Indicator010 Battery Low Indicator (New)(CA 3160)
S&T-INST001 Multitester with Audio-Visual Indicator (0202)
  Test the condition of electronic components like resistors, capacitors, diodes, photodiodes, and transistors by both visual and audio indication. The tester is also useful for checking continuity between two points.
S&T-INST002 Sensitive Vibration Detector (0511)
  The Vibration detector (piezo element) in this circuit can be used to detect the vibration of the rolling shutter guard and alarm you when unauthorised person tries to open it. The load in the circuit can be an AC operated electric bell or bulb used as alarm device.The alarm can be stopped using a push to off switch given in this circuit.
S&T-INST003 Zener Diode Tester (0404)
  Many a times the terminal and voltage markings are not specified on zener diode by manufacturer. Or, it may happen that these markings are not visible in old or used components. This kit provides a way to test and check zener diodes of 3.3V to 18V rating.
S&T-INST004 1 Hz Generator (9V) (CD 4521)
  The circuit generates a very precise 1 Hz square wave signal.
S&T-INST005 Continuity Tester 
  An audible continuity tester for repid checking of continuity or short circuit
S&T-INST006 Fault Finding Probe 
  Fault finding probe is Alternate of logic analyzer it's nothing more than bistable Multi vibrator.
S&T-INST007 Crystal Tester 
  Simple circuit to test X'tal Range of 100KHz to 30MHz.
S&T-INST008 CMOS Function Generator (6 V)
  The circuit offer a choice of sine,Square & triangle wave form &  Freq. range from 12Hz to 70KHz
S&T-INST009 PH Meter (+-9V) 
  Acidity/Alkalinity measurement by LCD range from 0 to 14PH.
S&T-INST010 Battery Tester (9V)
  This compact tester designed for testing the battery I.e. there has three LED's that indicates the indication of Alkali-manganese, Carbon-Zinc & Alkali Zinc of the battery. Devices multimeters power supply electricity.
S&T-INST011 Digital Panel Meter (New Led Version ) (5V)
  Most compact low power panel meter wired around ic 7107. This unit can be use for level measuring.
S&T-INST012 LM 35 Digit Thermometer (9V) (New)
S&T-Light001 Automatic Porch Light with Melody (0212)
  While you park your vehicle in the garage, this porch light automatically switches on for a specific duration. A melodious sound can also be heard at the same time. Time duration can be easily varied using a preset.
S&T-Light002 Bi colour LED Disco Runing Light (8812)
  This bicolour LED chaser circuit produces sequence of red and green lights. The frequency can be easily varied by adjusting the preset.
S&T-Light003 Emergency Light
S&T-Light004 Sunset Lamp
S&T-Light005 Touch Dimmer
  This is versatile three-step touch dimmer for varying the lamp intensity according to brightness required in the room. The circuit increases lamp intensity in steps, from off to low, medium, high and again off. The lamp stages are advanced sequentially by simply touching the touch plate connected to touch wire. At power-on condition, lamp is in OFF condition.
S&T-Light006 4 channel  Sequential light  (6V)
  This project can be used to switch decorative lighting or in the modern home & many uses among day's of festival. Each series carry a load of 1000watt.
S&T-Light007 6 Channel Sequential Light / Disco Light (6V )
  It's total load 1000 Watt per channel using triac.
S&T-Light008 Light  Dimmer  (230 V AC )
  This project using a simple triac to control in candescent filament lamp.(max : 1500W)
S&T-Light009 Automatic Cloak Room Light  (12V )
  This circuit puts an end to your guest fumbling for light switch in the clock room.
S&T-Light010 Light Sensitive Trigger (12 V- 16 V)
  This simple light operated switch can have variety app.
S&T-Light011 3 Channel Seq. Light  (6V)
  This is low cost simple 3ch sequential light used in many decorative light.Each series carry 1000watt
S&T-Light012 Light Sensitive Switch (230V)
  A versatile light operated switch Max.220V
S&T-Light013 Twilight Switch  (12 V )
  This switches the light on dusk & off at down.
S&T-Light014 Swastik (12V)
S&T-Light015 6 Channel Auto Reverse Sequential
  The Circuit drives 6 triac in forward & reverse direction It takes bulb load up to 1000w per channel. You can also drive in audio input by external source.
S&T-Light016 8 Alphabet sign Display Board 
  This simple circuit of 8 Alphabets,which goes bit by bit & then  puts all outputs off.You can use it for your shop/Office advertisement.
S&T-Light017 LED Ornaments (cross)  (9V )
S&T-Light018 LED Ornaments (Square) (9V)
S&T-Light019 LED Ornaments (circle) (9V)
S&T-Light020 LED Ornaments (Spiral) (9V)
S&T-Light021 LED Ornaments (Star) (9V)
  The purpose of this circuit gives you an exact idea how you can imagine the multi sign by LED's.
S&T-Light022 6 LED Dancing Light  (3V)
S&T-Light023 6 LED Dancing Light  (9V )
S&T-Light024 24 LED Dancing Light (12 V)
  This is a simple multi vibrator circuit-using transitor.
S&T-Light025 OM (12V)
  This circuit is arrange by LED's which idicate sign.
S&T-Light026 WelCome LED Dis. Board With 8 Alphabet Ckt . Board 
  This is simple LED Board in sign of WELCOME.
S&T-Light027 Flashing Running Light 
  This simple LED flashing light by using four groups of four LED's in each group will light simultaneously.
S&T-Light028 60 Led Chaser  (4 Ch)
S&T-Light029 150 Led Chaser (6 Ch)
S&T-Light030 300 Led Chaser (6 Ch)
  The circuit descibed here generates a unique running light effect each column in a row of 4 or 6 glow sequentially.
S&T-Light031 Bi-Colour Led Arraj Blinker (555 + CD 4017)
  This circuit are most flasher circuits flashes the same LED array as green and then as red for a preset time.
S&T-Light032 Tarana (AC 230V)(TR.BC 547)
  The circuit is nothing but simple multivibrator using two transistor operation on 230V AC supply
S&T-Light033 Traffic Light Control (CD4017 + 555)
  This project teaches the traffic rules using 3 relays for each light.
S&T-Light034 Low Power LED Flasher (9V) (New) (NE 555)
S&T-Light035 16 Channel Auto LED Running Light with Flashing LED (12V)(New)(74LS04)
S&T-Light036 3 way Traffic Light (New) (CD 4017)
S&T-Light037 Moving Light (New)(NE 555 + CD 4017)
S&T-Light038 Running Led (New) (NE 555)
S&T-Light039 SMD Flashing Heart(New)
S&T-MICS001 Periodically On/Off Mosquito Repellent
S&T-MICS002 Mosquito repellent  ( Domestic ) ( 1.5 V ) 
  This is the A stable Multi Vibrator which generate the desired frequencies for ran away mosquito.
S&T-MICS003 Rodents Deterent (6V) (NE 555)
  This circuit is safer solution for rate,mice & other rodent.
S&T-MICS004 Ionizer Mains (230 V AC )
  An environment friendly project based on theory of IONISATION can be used as an air purifier.
S&T-PS001 Variable Power Supply with Digital Control (0404)
  A regulated power supply is one of the most important and essential requirements in electronic lab. The available power supply must provide variable outputs in steps. This kit gives variable and fluctuation-free DC voltage as output in the range of 1.5V to 12V. It also provides proper display using LEDs as indicators and outputs here are easy to select.
S&T-PS002 Versatile Power Supply-0602
  It is a DC regulated variable power supply that can deliver 3.3V up to 15V ,1Amp output using an adjustable regulator IC LM317.
S&T-PS003 Lead Acid Battery Charger cum Voltage Analyser
  Continuous monitoring of battery conditions even for maintenance free lead acid batteries is necessary, because poor state of battery reduces its life, capacity and recharging ability. This circuit indicates the overcharge, low charge, normal and no charge battery conditions using LEDs and buzzer. 
S&T-PS004 Universal Nicad Charger (12V)
  This cheap alternative turns into an low expensive one charger for All Nicad Cell.
S&T-PS005 Lead Acid Battery Chager (L 200 ) (6 V / 12V ) (without Meter)
  Charger circuit with protection against reverse over 10 adding and short circuit with auto charging facility for 6V/12V batteries with meter.
S&T-PS006 Lead Acid Battery Charger LM 317 T (9 - 40 V )
  The simple charger for lead acid batteries having different AMP/hr capacity you can use it as common supply unit.
S&T-PS007 General Purpose Power Supply (2 Diode /4 Diode)
S&T-PS008 General Purpose Power Supply (4 Diode /2Cap )
  Simple rectifier circuit for AC to DC conversion.
S&T-PS009 78L/79L General Purpose Power Supply 
  Versatile Power supply using 78L series IC's with Amp current capacity(5V to 24V)
S&T-PS010 5V/ 500 MA Power Supply(LM129) 
  Stabilized power supply for exact output of 5V with regulation.
S&T-PS011  + /-15V/ 1AMP. Power Supply     
  Regulated Power supply with short circuit protection.
S&T-PS012 15V /1AMP. Power Supply 
  Regulated power supply with short circuit protection with AMP current capacity.
S&T-PS013 IC Power Supply (1V - 10V/1A) 
  Variable Stabilised power supply with adhustable current limiting facility.
S&T-PS014 0 - 30V Regulated Power Supply  (1Amp) 
  Variable Voltage source from 0-30V with adjstable current limiting facility.
S&T-PS015 3 AMP. Variable Power Supply (1.5 V To 24 V ) 
  Variable power supply from 1.25V to 24v at 3 AMP current.
S&T-PS016 Adjustable Regulated Power Supply (LM 317 T ) 
  Variable power supply from 1.25V to 25v at 1 AMP.
S&T-PS017 L - 200 Regulated Power Supply 
  Variable regulated power supply fully adjustable between 0-18v and 0-1.8A respectively.
S&T-PS018 3 AMP. / 5V Power Supply 
  5V regulated power supply with 3AMP current capacities.
S&T-PS019 Regulated Power Supply (2 Diode 3 to 6 AMP)
S&T-PS020 Regulated Power Supply (4 Diode 3 to 6 Amp)
S&T-PS021 Mulity Use PCB with +/- Supply Pcb (NEW) (LM 317)
S&T-Safety001 8 bit Code Lock for Appliances (0407)
  This electronic lock is useful in numerous applications where access to an article/gadget is restricted to limited number of persons. One unique feature of this circuit is that code can be easily changed here without any need of changing the wiring or connections,as is the case with other electronic locks.The circuit providers re-programming of the code just by changing the switch positions.
S&T-Safety002 Anti Bag Snatching Alarm
  Incidents of bag snatching are increasing nowadays. Many a times the snatcher can be caught easily if a loud alarm is raised. The kit uses plug and socket arrangement to raise the alarm whenever any snatching attempt is made. Thus, while travelling, this kit entitles the person to carry  cash or valuables without fear. Using the hidden key, only owner can turn OFF the alarm.
S&T-Safety003 Anti Theft Alarm for Vehicles (0304)
  This security system for vehicle generates a loud and continuous alarm in case of any unauthorised person getting access of your vehicle. As soon as, auto-lifter tries to start, the vehicle alarm gets activated leaving no option for him other than to leave the vehicle intact and run away Only owner will be able to turn OFF and reset the alarm.
S&T-Safety004 Cash Box Guard (1101)
S&T-Safety005 Digital Security System (0505)
  This circuit can help you from the intruders and strangers. Very thin copper wire loops has to be wired around your house and if any of the copper wire loops is broken, the display displays the particular number of the loop with buzzer sound. if more than one loops are broken it will display the sum of their lopps.
S&T-Safety006 Door Guard
S&T-Safety007 Electronic Watch Dog
  This circuit produces an alarm sound when a person crosses the gate. The Circuit comprises of Transmitter & Receiver which are mounted face to face on opposite pillars of the gate in a manner so that when someone interuppts between the two it gives an alarm.
S&T-Safety008 Electronics Bicycle Lock
S&T-Safety009 Long Range Burglar Alarm using laser torch
  This Circuit operates at a frequency of 5 khz. If the transmitter & receiver parts are properly aligned it can work upto a distance of even 30 meters When the objects cuts the transmitter and the receiver parts.
S&T-Safety010 Luggage Security Systems (0005)
  This circuit gives an alarm sound when someone tries to cut the luggage chain. Different sound effects are possible after doing simple connections.
S&T-Safety011 Magic Eye (9601)
  This magic eye fitted on the bottom of door entrance obviates the need for a call bell. It can also be used as an automatic guest indicator at homes or as a burglar alarm in banks.
S&T-Safety012 Simple Code Lock (0001)
  This electronic code lock responds only to the right sequence of four digits out of nine keys available on the keypad.
S&T-Safety013 7 Digital Code Lock (6 - 15 V ) 
  This code lock provides a high degree of security can be hooked with relay driver for use car door open etc.
S&T-Safety014 Electronic Digital Combination Lock (New) (CD 4017)
S&T-Safety015 Security System (New)(NE 555)
S&T-Safety016 Simple Digital Security System (New)(CD 4511)
S&T-Security001 Cellphone Detector
S&T-Security002 Infrared Object Counter
  This circuit can be installed in public places to count the number of people or objects passing through the transmitter & receiver. The circuit operate at a frequency of 38 Khz . The count will be displayed through the calculators.
S&T-Security003 Laptop Security Station (0910)
S&T-Security004 Smart Cellphone Holder (0507)
  This smart cellphone holder makes sure that you do not forget to carry your mobile phone. If you have forgotten to carry your cellphone, the LED light fitted in the cell phone holder will stop flashing to indicate that the mobile phone is not in the holder.
S&T-Security005 Digital Object Counter 
  The circuit using 74C926 counter utilizes the LDR to show the counting of the object.
S&T-Security006 Listening Bug (9V)
  It is simple circuit in - expensive circuit to listen to the conversation on in your adjoining room.
S&T-Security007 Powerfull Listening Bug(9V)(NEW)(LM741)
S&T-Security008 CCTV Night I/R Lluminator Watching (12V)(New)(7812)
S&T-Security009 Infrared Security Alarm (12V)(New)(74LS14)
S&T-Sensor001 Automatic water Level Controller
S&T-Sensor002 Hit Switch
  This versatile hit based switch is electronic equivalent of a switch. This circuit serves as an on/ off control for incorporation in a wide variety of electronic design.The circuit uses a Piezo electric diaphgram.
S&T-Sensor003 IR Remote Switch (0203)
  ON/OFF switching operation of a remote appliance can be done using this remote control. The circuit uses any TV, VCR, VCD or CD player remote as transmitter. Indication of different output stages is provided by LEDs. This helps in better understanding.
S&T-Sensor004 Remote Control for Home Appliances (0505)
  This handy circuit can be used to switch on and off any of your home appliances or any electrical device with a single press of your TV, VCD or DVD remote control. This low-cost circuit is based on 4017 counter IC which receives trigger pulse from IR sensor and switches on the relay through which electrical devices are switched on & on receiving the 2nd pulse the device is switched off.
S&T-Sensor005 Touch Sensitive Switch (EP-11)
  Sometimes one may want to switch a lamp just by touching it. This circuit provides a very simple and reliable way to do just that. The connected appliance will be turned ON by a slight touch of finger at the sensor. Another touch at the OFF sensor will turn it OFF. This can also be used as ahidden switch or electronic lock by concealing the touch sensors. 
S&T-Sensor006 Water Level Controller (EP-9)
  This circuit provides switching control of pump motor and pumps water from ground-level tank to overhead tank when the tank is completely empty. To monitor the status, each tank is provided with three probes.
S&T-Sensor007 Water level Controller-cum-Motor Protector kit (9908)
  This device provides switching on/off of the pump motor. Automatic switching off of the motor when overhead tank is full. It has low- and high-voltage cut-off control.
S&T-Sensor008 Teleremote Control (9910)
  This tele remote overcomes the range barrier of infrared remotes. Control is provided through the dial keypad of a remote telephone and switching on/off operation of up to ten appliances is possible. (This circuit is meant to control only four devices.)
S&T-Sensor009 Light /coin Operated Delay (12V Center Tape)
  This circuit is designed for when a ray of light is interrupted the power output is switched "ON" for a variable duration of 5 to 55 sec. To operate the relay.
S&T-Sensor010 Light Switch (New) Transistor
S&T-Sensor011 Photo Sensor with control Relay (New)
S&T-Sensor012 Liquid Level sensor  (12 V ) (CD 4093)
  Liquid level controller wired around a single chip & sense the level and alert you.
S&T-Sensor013 Clap Switch (12 V )  Transistors
  Simple electronic swithch activated by a clap can control (ON/OFF) fan light Radio & Tape.
S&T-Sensor014 Touch Plate / Switch ( Glass Epoxy) (12V )
  This simple ON/OFF touch plate by using the NAND Gate IC 4011,which has connected as a flip-flop.(There are two plates for ON-OFF).
S&T-Sensor015 Water Level Controller (12V) (7400)
  Improved water level controller has been provided with two flip flops for the two tanks and each tank has three probes to monitor its status.
S&T-Sensor016 Electronics Eye
  This circuit produces the sound while light Fails & stops while light comes back.
S&T-Sensor017 Heat Sensor with Fan Cooling (12V)(New) (LM 741)
S&T-Sensor018 Touch Sensitive Siren (New)
S&T-Sensor019 Touch Switch (using ic 555 Multivibator) (New) (NE 555)
S&T-Sensor020 IR Auto Switch
   I/R wash Basin Proximity switch(12V) (New)(Is 471 IR Sensor).
S&T-Sensor021 Metal Detector (9V)(New)
S&T-Sensor022 I/R Remote Switch (Universal) (12V) (74LS221)
  This circuit use one channel universal remote control.
S&T-Sensor023 I/R Remote Control On/Off Switch (12V)
S&T-Sensor024 4 Channel Long range Infrared Remote Control (12V)
S&T-Sensor025 4 Channel Long range RF BASE Remote Control (on/off) (12V)
S&T-Sensor026 4 Channel Long range RF BASE Remote Control (Push to on type) (12V)
S&T-Sensor027 4 Channel Long range RF BASE Remote Control (on/off) (12V)300 meter
S&T-Sensor028 4 Channel Long range RF BASE Remote Control (Push to on) (12V)300 meter
S&T-Sensor Clap based Switch For Device-0303 - In stock but project is off
S&T-Solar001 Solar Generator Kit (New)(NE 555)
S&T-Tele001 Low-cost Transistorised Intercom (9910)
  Voice at one end is amplified and listened at the other end through a loudspeaker as a one-way intercom. A two-way intercom can be similarly assembled using two such kits.
S&T-Tele002 Musical Hold On for Telephone
  Using this add-on external circuit attached to your telephone a melodious music is generated on telephone line. During the entire hold-on interval, person on other end enjoys a pleasant music. To resume talking when you are back, just flick the switch to OFF mposition.A Red LED included in the circuit that phone line is on hold and it automatically turns OFF when music stops.
S&T-Tele003 Parallel Telephone Ringer
  Due to high volume of your hi-fi audio/video systems or any other reason sometimes telephone ringing in other room is not heard. In addition to provide indication that your telephone is ringing in other room this telephone extension ringer avoids overhearing of conversation by an undesired person at other end.
S&T-Tele004 Telephone Call Recorder (9507)
  This telephone message recorder records all the conversations on tape-recorder. In case nobody attends the call, it records the incoming ring signal only.
S&T-Tele005 Two Way Intercom  (9V)
  This is simple intercom system for communication of two persons in the same building OR office.
S&T-Tele006 Hold On Music For Telephone (UM66)
  This is the external ckt to telephone line which gives the pleasant music during the hold on interval.
S&T-Tele007 Digital Telephone Amplifer (New)(LM 386)
S&T-Tele008 Parallel Telephone Ringer (New)(Bel 1240)
S&T-Timer001 IR Remote Control Timer (0305)
  The circuit uses IR transmission for remotely controlling ON/OFF operation of upto two electrical/electronics appliances. Pressing push-to-on switch from a distant transmitter, normally OFF appliance is turned ON and another normally OFF appliance is turned ON for some specific time period. This time period can be varied in the range of 0.11 to 110 seconds for given set of components and range of remote is about 3 meters.
S&T-Timer002 PC Based Automatic Time Manager (0708)
S&T-Timer003 PC Based Timer (0502)
  This circuit interfaced with PC computer through D-25 pin male connector, can switch on and switch off the device for a particular timing required by the user. The program is written in C languages & compiled in Turbo C compiler. The maximum timing of the circuit is for 18 hours.
S&T-Timer004 Sound Operated Timer (8905)
  This electronic switch gets activated by the sound of a clap. It can be used in a sound-operated motor driven toy car or any other gadget.
S&T-Timer005 Timer for Students (9910)
  This timer gives alarm after a preset time period and a few beeps at half the selected time. The timer could be programmed for other time periods as well.
S&T-Timer006 Digital Alarm Clock ( 0.5" Duplex Dis)  Red And Green 
S&T-Timer007 Digital Wall Clock  (3 1/2 " Dis. ) (5 mm LED) 
  This is a simple alarm clock with using Chip 8560 TMS 3450 with Battery backup facility.
S&T-Timer008 555 Timer  (9V-12V) 
  This is capable of Drive Relay with time delays From 1 sec. To 100sec.
S&T-Timer009 Knotted Handkerchief  (timer up to 120 minutes ) (9v)
  This reminds one to do something in fact it is extrmely compact timer.
S&T-Timer010 Kitchen Timer  (Up to 17 minutes ) ( 9 V )
  This circuit adjustable between 1 to 17 Minutes provies Audible time alarm.
S&T-Timer011 Time Switch  (6V )
  This timer is very useful for NICD chargers.
S&T-Timer012 Timer with Audio Alarm (9V) (CD 4060)
  This circuit gives a audible warning from 1min to 120min.
S&T-Timer013 555 Timer with On/Off Indicator (12V)(new)
S&T-Timer014 1 to 5 mins 200/240V Timer (new)
S&T-Timer015 Telephone Cut off Timer 1-20 Minute (new)
S&T-Timer016 2 Digit Strom Distance Counter (9v)(New)(NE 555)
S&T-Timer017 2 Digit Door Bell Counter (6V)(New)(CD 4026/555)
S&T-Timer018 3 Digit Counter (New)(CD 4093)
  The high-frequency signal generated by a transformer is useful as pest-repeller. The intensity can be easily varied by tuning the preset.
S&T-AM001 Microcontroller Based School Timer (MC68HC705J1A)
  This versatile programmable school timer can be used to display real time clock as well as school bell timings on four 7-segment LED displays.It can store about 20 bell timings and activates the bell through a relay at every predetermined period.
S&T-AM002 Digital count down timer
S&T-AM003 RTC Based Time Operated Electrical Appliances
S&T-AM004 Time Operated Solar Tracking System
S&T-AM005 MatLAB based Automatic room light control
S&T-AM006 Digital Multimode Timer with LED Display (12V DC)
  This is the low cost, micro-controller based universal timer module for any industrial & commercial application.Timer can countdown from 1-99 seconds,1-99 minutes of 1-99 hours.Timer has 4+1 press buttons , UP, DOWN, MODE, START + RESET.UP,DOWN set time that we want to count dow.once we set time,set MODE ,we can start countdown sequence.After countdown the relay turns on.To restart timer,we must press RESET button.
S&T-AT001 Adaptive Lighting System for Automobiles
S&T-AVR001 Remote controlled real time clock with device controller (0706)
  This circuit is based on ATMEGA16 microcontroller and DS1307 real time clock chip. A 16x2 LCD display is used for user interface to display time, date and various settings. A real time clock chip is set to control five different alarm settings.
S&T-AVR002 Secured Room Access System (0710)
  This microcontroller-based digital is an access control system that allows only authorised persons to access a restricted area.When someone tries to enter the restricted area by entering invalid passwords continuously,the system locks itself.
S&T-DU001 Call Bell with WELCOME Indication
S&T-EC001 PC to MC Communication
S&T-EC002 PC to PC Wireless Communication through RF Link
S&T-EC003 Audio Comunication using Fiber optic Cable
  This kit is designed for audio communication you can Transmit your voice from One end to Another with the Help of fiber optic cable kit comes along with circuit diagram,working explanation,part explanation,assembling instruction,basic description of fiber optic cable & components data sheets.(kit with fiber optic cable,speaker & power supply).
S&T-EE001 Electronic Circuit Breaker
S&T-EE002 RF based Automatic Meter Reading with RF Link
S&T-EE003 RF based Automatic Meter Reading with GSM
S&T-EE004 SMS based DC Motor Control
S&T-EE005 GSM Based Stepper Motor Control
S&T-EE006 GSM Based Generator Start/Stop System
S&T-INS001 Computerised Electrical Equipment
S&T-INS002 Digital Voltmeter (0707)
  Digital Voltmeter is designed as a panel meter and can be used in DC power supplies panels or where it is necessary to have an accurate indication of the voltage.
S&T-INS003 Two Channel PC Based Oscilloscope (0612)
  Presented here is an oscilloscope that accepts input up to 10 kHz with 16V from input source and display the output waveform on your PC monitor. PIC18F2550 microcontroller chip from Microchip is used as the main controller.
S&T-INS004 Current sensor
S&T-MC001 AT89C2051 Microcontroller based Count Down Timer (0603)
  Here is a microcontroller based timer that performs countdown operation for upto 99 minutes with two 7-segment displays showing the actual time left. AT89C2051 chip is used in this circuit. The program can be easily modified according to users requirement.
S&T-MC002 Cellphone Based Device Control with Voice Acknowledgement
S&T-MC003 Microcontroller based Bi-Directional Visitor Counter (0701)
  Here is a low-cost AT89C52 microcontroller-based visitor counter that can be used to count the number of persons at a place. It consists of three 7-segment displays (LTS543 ) to display the number of visitors upto 999. The circuit works off a 5V DC supply.
S&T-MC004 Microcontroller Based Code Lock (0608)
  This simple code lock project is based on a 20-pin ATMEL microcontroller AT89C2051.It employs a 4-dihit sequential code with time-out security feature.Apart from the microcontroller, the main conponents include CD4050 non-inverting buffer,LCD display.
S&T-MC005 Microcontroller Based DC Flush System (0612)
  Here is an automatic flush system(toilet & urinal)that automatically flushes the fixture when the user departs.It employs an AT89C2051 micrcontroller and an infrared sensor to detect a user approaching the fixture,then waits until the user departs. It employs an AT89C2051 microcontroller and an infrared sensor to detect a user approaching the fixture, then waits until the user departs. It also flushes before the person departs if the person is present for more than the preset time (5 minutes). CD4050 is used as a buffer for the output ports of the microcontroller, TSOP1738 is used as an IR sensor and a solenoid is used to actuate the flush from a 6V power supply with a battery backup inside the unit. 
S&T-MC006 Microcontroller Based Speedometer Cum Odometer
  This project describes how to build a digital speedometer-cum-odometer for your motorbike. The features of the project are digital readouts for speed in km/hour and distance in kilometres, economical and easy to construct.
S&T-MC007 Microcontroller based Tachometer (0801)
  This is an easy-to-make photoelectric based tachometer project for measuring the RPM(revolution per minute)of rotating shaft,shop-floor tools andmany household machines without any mechanical or electrical interface.
S&T-MC008 Microcontroller Based Temperature indicator using AT89C52 (0407)
  It is microcontroller based temperature temperature indicator that displays the temperature in the range of -55 degree celcius to 125 degree celcius. The Indicator output the calibrated date in digital form . It uses a temperature sensor Chip.
S&T-MC009 Microcontroller based Ultrasonic Distance Meter (0802)
  This project employs 40khz ultrasonic transducers for distance measurement up to 2.5 metres.Ultrasonic transducers measure the amount of time taken for a pulse of sound to travel to a particular surface and return as the reflected echo.
S&T-MC010 Microcontroller based Water level controller cum motor protector (0702)
  This circuit uses an AT89C51 microcontroller as the main controller. It can be used to switch ON and OFF the motor depending upon the level of the water in the tank. The status is displayed on an LCD module. The circuit also protects the motor from high voltage.
S&T-MC011 Microcontroller basedDC Motor Controller
S&T-MC012 Microcotroller Based Industrial Timer (0706)
  Here is a simple industrial timer based on 40-pin Atmel AT89S52 microcontroller that performs count-down operation up to 9999 minutes/second with four 7-segment displays showing the actual time left.The relay energises as you press the start switch.
S&T-MC013 Microcontroller based Moving Message Display
S&T-MC014 Remote Control Digital Audio Processor (0502)
  This infrared (IR)remote controlled digital audio processor has four stereo input channels and one stereo output.The processors in this system control various functions of each channel and output them to your audio amplifier.
S&T-MC015 Stepper motor control using microcotroller (0410)
  This circuit is based on 89C51 microcontroller.It provides to control the rotation of a DC stepper motor in clockwise as well as anticlockwise direction. This module is simple and easy to construct and can be used in many application e.g. Machine control,Robotics. 
S&T-MC016 Digital Calendar
S&T-MC017 Stepper Motor Control Through RF Link
S&T-MC018 Automatic Room Light Controller with Visitor Counter
S&T-MC019 DS 1820 Based Temperature Controller
S&T-MC020 MicroController Based Temperature Controller
S&T-MC021 Automatic College Bell
S&T-MC022 Sensor based Solar Tracking System
S&T-MC023 Multistory Car Parking System
S&T-MC024 Electronics Components Tester
S&T-MC025 Finger Print Based Security System
S&T-MC026 Biomedical Monitoring System without GSM
S&T-MC027 Gates Emulator
S&T-MC028 Home Security system with password
S&T-MC029 Infrared Interruption Counter
S&T-MC030 Infrared Remote Control Switch (6 device + 1 Fan)
S&T-MC031 Biomedical Monitoring System with GSM
S&T-MC032 MicroController Based Digital Clock with Alarm
S&T-MC033 Microcontroller Based Digital Code Lock
S&T-MC034 Mulipattern Running Lights
S&T-MC035 Password Based Door Locking
S&T-MC036 RF Based Remote Control
S&T-MC037 Secured Wireless Data Communication
S&T-MC038 RFID Based Security System
S&T-MC039 RFID Based attendance System
S&T-MC040 RFID Based toltax deduction system
S&T-MC041 RFID Based Automatic Car Parking
S&T-MC042 RFID Based Automatic Library Management System
S&T-MC043 RFID Based Shopping Cart
S&T-MC044 RFID Based Local Vehicle Tracking System
S&T-MC045 RFID Based Electronic Road Pricing for Controlling the traffic
S&T-MC046 RFID Based ATM Machine
S&T-MC047 RFID Based Railway Platform to Display Position of coach
S&T-MC048 RFID Based Railway reservation
S&T-MC049 RFID Based Automatic Challan System
S&T-MC050 RFID based Prepaid Energy Meter with recharge Option
S&T-MC051 RFID Based Voting Machine
S&T-MC052 RFID Based Banking System
S&T-MC053 RFID Based Ration Card
S&T-MC054 RFID Based Metro Train System
S&T-MC055 RFID Based Animal Identification Device for Dairy Farms
S&T-MC056 RFID Based Telemedicine System
S&T-MC057 RFID Based Event Tracking System for Sports
S&T-MC058 RFID based Blind man stick
S&T-MC059 RFID Based Security cum attendance System
S&T-MC060 SMS based Home Appliances Control
S&T-MC061 SMS based Voting Machine
S&T-MC062 SMS Based Home Security System
S&T-MC063 GSM Energy Meter Monitoring with Temper proof
S&T-MC064 SMS Based Vehical Ignition System for Safety
S&T-MC065 GSM Based anti theft system for vehical
S&T-MC066 GSM Based Railway Reservation System
S&T-MC067 GSM Based Vehical Location Finder for Parking
S&T-MC068 GSM Based Notice Board for School / Colleges
S&T-MC069 24-Hour ON/OFF Clock Timer using Microcontroller
  It's a 4 digit,7 segments,24-hour clock timer that can be used to control any application.You can program both ON time & OFF time with this project.It requires a 3V battery back up.Useful for switching loads up to 500W.
S&T-MC070 Programeble School bell timer (12v DC) IC 8051
  This versatile programmable school timer can be used to display real time clock as well as school bell timings on LED / LCD Display.It can store about 8 bell timings and activates the bell through a relay at every predetermined period.
S&T-MC071 Micro Controller Annunciation System (12V DC)
  This Annunciation system detects up to 8 different faulty conditions and informs the operator about them by means of LEDs and playing Voice messages stored in a No Volatile Memory.It simultaneously sounds a Buzzer alarm and Lights a Fault indication Signal connected to it.
S&T-MC072 8 Channel Analog to Digital Converter (A to D)
  This analog to digital converter read up to 8 different Analog signal (e.g temperature) and display on 16x2 line LCD.
S&T-MC073 8 Zone Intruder Alarm System (230V Ac)
  A Micro controller based intruder alarm can offer the following features.(1) Moritoring and singnaling of each sensor for activation and cable continuity.(2) Temper input panic push button.(4) LED's indicate.
S&T-MC074 Home Automation Control System using DTMF Telephone Line (12V DC)
  Dial your number using DTMF phone or cell phone from anywhere in world and remotely turn On/Off any of 8 relays.The MCU on ther interface senses Telephone ring,Automatic telephone pick up,and line hang up,displays information on a 16x2 LCD module and controls the relay switching.This interface uses the popular MT8870 DTMF decoder IC analog with AT89C52.
S&T-MC075 Microcontoller based Security Access System using 89c51
  This project uses Micro controller to offer Door Access with the following feature(1) - 4x4 matrix keypad for entering Access Code.(2) - 16x2 Line LCD module to display status and Error Message (3) - 3A Relay to control / Operate electronic lock or devices connected to the interface.(4)-On board flash EEPROM that stores system Parameters and Access Code and needs no battery backup.(5)-Buzzer to annunciate a key press and error situation.
S&T-MC076 Microcontroller based telephone Intercom system [230 AC]
  This is simple but effective solution for internal intercom system for home,office,school,collage or banks. The system is intended for up to seven sets each of which generates a pulse code when a number is dialed or keyed in. This projects uses microcontroller to offer the following feachures.
S&T-MC077 Security Auto Dailing System [12V DC]
  The Projects consists of two sensor(door sensor and fire sensor) whenever it is detected by the any one of the sensor it sends a signal to the Auto dialer. The Auto dialer wil then automatically dials up to four preset telephone phone numbers and plays your prerecorded message.
S&T-MC078 Water Level Controller with LCD Display
  Here is a micro controller based,versatile circuit with indicates the level of water in a tank. This circuit produces alarm when water level is below the lowest level L1 and also control the pump (on and  off) when water just touches the highest-level L8. The circuit is designed to display 8 different levels on LCD display. 
S&T-MC079 Real Time Clock using AT89S8252
S&T-MC080 Electonic Voting Machine using AT89C51
S&T-MC081 Stopwatch Using AT89C51
S&T-MC082 Countdown counter using Atmel AT89C51
S&T-MC083 Fastest Finger First using microcontroller 89C51
S&T-MC084 Microcontroller based DC Motor Controller using AT89C51
S&T-MC085 Microcontroller base Code Lock using AT89C2051
S&T-MC086 RS232 Anolog To Digital Converter using AT89C51 MCU
  A 8 - bit ADC chip interface with the 8051 micro controller. A micro controller read the data and send it to the serial prot(RS 232).
S&T-PC001 PC to PC Optical Fiber Communication
S&T-PC002 8 Channel Remote Control using Printer port [12V DC]
  This kit with the help of a computer program can control External Equipment Using your printer Port with the of control Relays.Kit Comes Along With Circuit Diagram,Working Explanation,Part Explanation,Assembling Instruction,Basic Desciption of PC Serial(RS232) port & Component data sheets. 
S&T-PC003 PC Based Dual Stepper Motor Driver (Kit with Stepper motor)
  This kit Enables Users to Control A Stepper Motors via A Parallel/Printer Port of A PC.Kit comes Along with circuit Diagram,Working Explanation,Part Explanation, Assembling Instruction,Basic Desciption of Stepper Motor,PC Parallel port & Component Data Sheets.
S&T-PC004 PC to PC Communication Using Fiber Optic Cable
  This kit is designed for data Communication.You can transmit your data from One PC to another Pc with the Help of Fiber Optic Cable.Kit comes along with circuit diagram,working explanation,part explanation,assembling instruction Basic description of PC serial port(RS232),Fiber Optic Cable & Datasheets.
S&T-PC005 Online Monitoring and Control System [12V]
  This is a Micro controller based project to control 8 power Outlets By net. These days' permanent Internet connections like cable. Are spreading among the people so web based devices started. To useful even for the normal Households and industrial application.The Device can be accessed from anywhere on the'Net".
S&T-PC006 PC Based Door Access and Attendance Logger using RFID.
  RF Id is wireless solution for the security application. This is the Wire less door access system using micro controller and RF module. In this system one receiver connected with the door and Computer serial port for attendamce recording,it's read the ID of valid user.If any user come near the door with the RF ID tag,door will be open automaticaly for few second and display the user ID on PC.PC store Attendance with date and time.(kit with two tag) 
S&T-PC007 Appliance control by Voice [12V DC]
  This is the PC based Relay controller,which can be controlled by your voice commands,using PC based voice recognition and micro controller interface. You can control appliance by voice.
S&T-PC008 PC based Door Access and Attendance Logger Using Smart Card.
  This is smart card based Access System for Bank,ATM,Bank Lockers,Schools,Collage and home security application.It's using micro controller and smart card(Memory Card). Pc interfaces for Display user ID,Photograph and stores the user Attendance with time and date(kit with four card).
S&T-PC009 PC Based Thermometer [12V DC]
  The Microcontroller is used to read and display LM35 & also send data to PC via RS232 for data logging or display.
S&T-PC010 PC Controlled Data Acquisition System
  This kit connects to the standard PC parallel printer port and provides a 'real word'interface for your computer.It enables the PC to both monitor and control external events and devices.The world is a mixed analog & digital world.With the appropriate sensor the PC can monitor physical variables such as pressure,temperature,light intesity,weight..etc,process the information and then use the result to control physical devices such as motor,siren,relay..etc.
S&T-PC011 Wireless Device Controller by PC [12V DC]
  The RF based transmitter and reciever board is designed for wireless Device control. Transmitter connects with PC serial port and sends command (kit with PC Softwear).Receiver has eight relays for controlling external load.
S&T-PC012 USB Device control by PC [Triac]
  Our USB Device control Board is a solution for controlling up to 8 Triac(Device) via PC USB port. This is main features list, [1] Up to 8 triac control [2] No need External Power Supply [3] Data received indicator LED [4] LED indicator to display triac on.
S&T-PC013 USB Device control by PC [Relay]
  Our USB Device control Board is a solution for controlling up to 8 relay(Device) via PC USB port. This is main features list, [1] Up to 8 relay's control [2] Operate on 12V DC Power Supply  [3] Data received indicator LED [4] LED indicator to display triac on/off state.
S&T-PC014 RS232 Servo Controller Board [12V DC]
  Our 8/16 Servo Controller Board is a solution for controlling up to 8/16 Servos via PC. There main features, [1] Individual servo controlled via PC serial port interface [2] RS232 serial port interface [3] Windows based softwear for Manual and Automatic [4] Windows based interface-works with WIN95,98,2000,ME and XP [5] Microcontroller based design for greater flexibility and ease of control (kit with RS232 data cable).
S&T-PC015 PC Programmable Intruder alarm system [12V DC] PC
  This security system is designed to be used in a simple installation with just a hidden switch and not a keyboard.there are several features such as a battery monitor, entry delay,exit delay,bell time that also make it good for remote locations just run off a battery.
S&T-PIC001 PIC Microcontroller Based Electronic Lock
S&T-PIC002 Temperature Indicator Using PIC 16F877A
S&T-PIC003 Programeble Count Down Timer Using PIC Micro (230v)
  This count down timer is very useful for industrial application. Its time delay is programeble, from 1 minute to 99 minutes with 4 digit 7 segment LED disply. Kit include circuit diagram, working explanation, part explanation, assmbling instruction & comp
S&T-PIC004 Micro Controller Based Programmable Security Door Lock
  This Project is a very useful door security application. It operates a relay (for example to open a door) for a few seconds when a valid code is entered.The secet code can be changed any time after entering the current code.Kit includes the relay for Door.
S&T-PIC005 Stepper motor controller using micro controller (kit with 8.2V 2 phase unipolar stepper motor)
  This kit is very useful to control a 2 phase unipolar pm type DC stepper motor. Kit include circuit diagram, working explanation, part explanation, assmbling instruction, a basic discription of stepper motor component data sheet. excellent for eng. student.
S&T-PIC006 40 MHZ Frequency Counter using PIC Micro Controller
  This project proposes s simple frequency reader,which can be used as a workbench instument.In face it exhibits several very interesting features,like a maximum working frequency abvoe 40 MHz, a 10 Hz resolution,a low consumption (50 ma) and a very simple.
S&T-PIC007 Ultrasonic Range Finder Using PIC Micro Controller
  This project is a handheld range finding device,using ultrasound and a PIC 16F84 microcontroller.A 16x2 LCD displays the measurement in meters,feet & inches.Kit includes circuit diagram,working explanation,part explanation,assembling instruction & component.
S&T-PIC008 Micro Controller Based wind Speed Meter with 16x2 LCD Display
  A completely solid-state anemometer using ultrasonic Techniques to measure wind speed.Highly accurate. LCD readout in metric or imperial Displays up to 50 mph.Kit Comes Along with Circuit Diagram,Working Exolanation,Part Explanation,Assembiling Instruction & component.
S&T-PIC009 Security Access system (230v)
  The micro controller base digital lock presanted hear is an access control system that allows only authorised person to access to a restricted area.when an authorised person enters predetermined number (Password) via the keypad / the relay opparated for a
S&T-PIC010 DTMF Telephone Remote Control
  This device connects to the telephone lone and can be used to remotely control up to 3 relay outputs using a DTMF (tone dialing) telephone. A PIC micro controller controls the switcher.
S&T-PIC011 Micro Controller Based Dual Temperature Meter with RS232 Interface
  The Micro controller is used to read and display two LM35 based Temperature Sensor Connected to it on a 16x2 Line LCD module.This information is also sent to the PC via RS232 for Data logging or display.
S&T-PIC012 Micro Controller Base Heartbeat Monitor
  The Heartbeat monitor design presented here takes advantage of a OUC16F87X micro controller's capabilities and uses an alphanumeric LCD.Screen,Plus serial data link to a PC-compatible computer.The design can be used as a handheld unit without using a PC. In this role it outputs heartbeat waveform to the LCD.
S&T-PIC013 SMS Based Device Control Using GSM Modem
  A GSM based SMS Control System; u can just send SMS by cell phone and control eight Devices.Displays information on 16x2 LCD module and controls the relay switching. This interface uses the Micro controller and GSM Modem.Complete solution to your Home Automation by SMS.(Kit with GSM modem).
S&T-PIC014 Programmable Temperature Controller [12V DC]
  It's based on a PIC MCU and National Temperature Sensor.The Temperature is displayed on a 16 x 2 LCD display,and two buttons are used for setting parameters.On Board flash EPROM that stores Parameters and needs no attery backup. A high current relay switches the load,which can be a heating elememt.
S&T-PIC015 Digital Remote Control Audio Processor [12V DC]
  This project presents an infrared remote control digital four channel audio processor.It is based on micro controller and audio processor chip. Its main features are 1) infrared remote control. 2) Full function keys on for audio processor controlling 3) four channel stereo input.4) volume,baas,treble,mute,surround and balance control 5) setting desplay on ten individual LED.(kit with remote hend set)
S&T-PIC016 RF ID Door Access Systems [12V DC]
  RF ID is a wireless solution for the security application. This is the wire less door access system using micro controller and RF module. In this system one reciver connected with the door and user have on RF ID tag (Tx), its read the Id of valid user. If any valid user comes near the door with the RF ID tag,door will be open automatically for few second and display the user ID on LCD Display.(kit with 2tag)
S&T-PIC017 Smart Card Based Door Access System with LCD [12V DC]
  This is smart card based Access system for Bank ATM,Bank Lockers,Schools,Collage and home security application. Its using micro controller and smart card(memory card). (kit with four card)
S&T-PIC018 Programmable Scrolling Message Sign Board [12V DC]
  This is a great kit to help you build your electronics knowledge plus when you are done building it you will have a product that you will actually use. This scrolling sign has different characters and can store messages up to 4000 characters long, The message are store in memory even afterpower-down.so,it'll be there when you turn it back on the scroll rate is adjustable to 10 different speeds.you can connect directly to your computer and type message with your keyboard.
S&T-PIC019 SERVO motor Controllder Board (Preset)
  Our 5 channel Servo Controller Board is a solution for controlling up to 5 servo via onboard preset or potentiometer. [12V DC]
S&T-PIC020 SERVO motor Controllder Board (Switch)
  Our 5 channel Servo Controller Board is a solution for controlling up to 5 servo via onboard or external switches. [12V DC]
S&T-SC001 Heat Sensitive Switch (0511)
  This circuit can be used to switch on or off the load at a predetermined temperature. The temperature is set through the output of a temperature sensor IC or heat sensor and a voltage divider network. When the temperature reaches the preset value, the circuit energises the relay and automatically turns on the load such as fan through the contact of the relay.
S&T-SC002 DS 1820 Based High Precision Temperature Indicator
S&T-SC003 Temperature Controlled Fan
S&T-SC004 12 channel switch remote
S&T-SC005 12 Channel Infrared Remote Controle System (kit with remote hand set)
  This is the multi channel infrared Remote system offers far too many features to list them all here.(1) 12 channels,each individually controlled (2) Infrared operated from commercial hand-held,Infrared remote,(3) Long range(>15m) operation,(4) Relay output 10A rated changerover contects.(5) Two banks of relay.(6) Each bank can be set to momentary or toggle(push on,push off) mode.(7) Relay Indicator LED.(kit with remote handset).
S&T-SC006 14 Channel Infrared Remote Decorder Module(6-12V DC)
  This Kit uses a commercial 14 button remote control,unit to put an active low signal onto one of 14 output pins on a decoder IC.That is,when a buttorn is pressed the pin corresponding to that button goes low.Normally,each of the 14 output pins is high.
S&T-SC007 8 Channel RF Remote Control [12V DC]
  This is the multi channel RF Remote system offers far too many features to list them all here, [1] 8 channels,each individually controlled [2] long range (100 to 300m in open space) operation [3] Relay output 5A rated changeover contactsor toggle (push on,push off) mode.Relay Indicator LED.
S&T-SL001 Automatic Low Power Emergency Light (0801)
  Here is a white-LED based emergency light that turns on automatically when main supply fails and turns off when mains power resumes.It has its own battery charger and stops when fully charged.
S&T-SL002 Microcontroller based Solar Charger with 10W Solar Panel
S&T-SL003 Solar Light System with 10W Panel
S&T-SL004 Street Light Controller
S&T-SL005 Microcontroller based LED Light Chaser
S&T-SS001 Secure Digital Access System Using iButton
S&T-SV001 Speed Checker For HighWays (0512)
  With the two lasers installed at 100m apart on one side and corresponding LDRs on the other side of the highway,when the vehicle crosses the two laser beams,this circuit can check the speed of a vehicle through the readings on a 7-segment display unit. It also activates an audio alarm (piezo-buzzer)when the vehicle exceeds the permissible limit.
S&T-SV002 Ultrasonic Movement Detector
  This circuit will find many uses as it restricts entry to an unwanted person in a particular area scanned by the transducer.The circuit in turn triggers the relay to put on txternal load up to 1000w.
S&T-RBT001 Microcontroller based ROBO Car with Major Electronic Components
S&T-RBT002 Remote Controlled Land Rover - A DIY Robotic Project -0606
  The project integrates a number of circuits to achieve the working model of a Land rover vehicle. It can be remotely instructed to perform simple functions through appropriate push-button switch on the remote control like : move forward, backward, right and left.
S&T-RBT003 Cellphone Operated Land Rover (Atmega 16)-0807
  In this project,the robot is controlled by a mobile phone that makes a call to the mobile phone attached to the robot.In the course of a call,a tone corresponding to the button pressed is heard at the other end of the call.
S&T-RBT004 Line follower Robot with PIC microcontroller
S&T-RBT005 Wall Follower Robot with PIC microcontroller
S&T-RBT006 Edge Detector/Avoiding Robot with PIC Microcontroller
S&T-RBT007 Obstacle Detector /Avoding Robot with PIC Microcontroller
S&T-RBT008 URDP (Universal Robotics Development Platform)Chassis
S&T-RBT009 Wireless Computer Control Module
S&T-RBT010 Golbo Chassis—Robotic Development Platform
S&T-RBT011 Universal Robotic Development Platform - URDP
S&T-RBT012 Robotic Arm and Gripper Kit
S&T-RBT013 Robot Controller - 8051
S&T-RBT014 tMECH Kit (OPTO card based Robotic Kit)
S&T-RBT015 tBOT Kit (8051 based Robotic Kit)
S&T-RBT016 tROBS Kit (AVR based Robotic kit)
S&T-RBT017 tMICE Kit (Micromouse Assembled Kit)
S&T-RBT018 Cell phone Controlled Robots
S&T-RBT019 Obstacle Avoiding Robot
S&T-RBT020 Wall Follower Robot
S&T-RBT021 Edge avoiding robot 8051
S&T-RBT022 Object sorting robot based on color without conveyer
S&T-RBT023 Vacuum Cleaning robot
S&T-RBT024 Pipe Climbing Robot
S&T-RBT025 Fire Fighting Robot
S&T-RBT026 Robotic fork lift
S&T-RBT027 Object sorting robot based on color with conveyer
S&T-RBT028 Agriculture Robot
S&T-RBT029 Spider Robot-Six legged robot
S&T-RBT030 PIC robotic Development Platform with Programmer and Chassis
S&T-RBT031 MATLAB based Survelillance Robot
S&T-RBT032 Mobile Multifunction Robot
S&T-RBT033 PC Based Robot without GUI
S&T-RBT034 PC Based Robot with with GUI in Lab VIEW / MATLAB
S&T-RBT035 GSM Control Wireless Robot
S&T-RBT036 Wireless ROBO controller by PC [12V DC]
  The RF based transmitter and receiver board is designed for wireless motor controlling. Transmitter connects with PC serial port and sends command (kit with PC soft wear.) Receiver has two channel motor driver to control a DC motor (Left,Right and Stop). 
S&T-AM007 SCADA ( Supervisory Control and Data Acqisition) for remote industrial plant operation
  Supervisor sitting on the PC terminal is able to control plant parameters remotely over Rs 232 network while monitoring the data acquired through several sensors.The project uses a front end for the control and a backend with microcontroller interfaced to an ADC from temperature sensors for data collection and control.
S&T-CE001 Three phase star delta starter using relays and adjustable electronic timer for induction motor
  Star/Delta starters are probably the most common reduced voltage starters in the 50Hz industrial motor world. This project operates a 3 phase motor at 440 volt AC mains supply 50 Hz with a set of 12 volt DC relays, an electronically adjustable timer and a set of relays.
S&T-CE002 Induction motor protection from Single phasing and over temperature
  Protecting a 3 phase induction motor from single phasing, over voltage and over temperature using sensors interfaced to micro controller to output a relay operation for disconnecting the motor.
S&T-CE003 Soft start of 3 phase induction motor by using 2 nos. Back to back scrs in each phase
  Here we use 6nos of silicon controlled rectifiers in anti-parallel, two in each phase which are phase controlled in a similar manner to a light dimmer, where they are gradually turned on for a part of each cycle to control the voltage by varying the conduction angle of the SCR. Increasing the conduction angle will increase the average output voltage. By variation of the conduction angle, the output voltage can be reduced during starting and then the SCRs are bypassed.
S&T-CE004 Soft start of 3 phase induction motor by using 2 nos. Back to back scrs in each phase(using lamps only)
  Understaning soft start of IM by watching the lamps connected in place of the 3 phase motor from low voltage low intensity to full voltage full intensity at the time of start.
S&T-CE005 Three phase fault analysis with auto reset on temporary fault and permanent trip otherwise
  six number of step down transformers used for forming one star and another delta at the output with a set of switches to inputs LL, LG, 3L fault that triggers a 555 timer in monostable to reset or permanently trip the output relay connected to another 555 timer in astable.
S&T-CE006 High voltage dc upto 3kv from ac by using diode and capacitors in ladder network
  1000 PIV diodes in combination with 100MFD electrolytic capacitors forming a ladder network multiplies the input AC to develop 12 times approximately DC output.
S&T-CE007 Auto selection of any available phase in 3 Phase supply system
  The project is to provide ac mains supply 230 volt to the single phase load if any of the phases, out of the 3 phases in a house goes missing.
S&T-CE008 Wireless power transfer
  The project is to develop a system of wireless power transfer for pace makers battery charging (An electronic device implanted in body that works in place of a defective heart valve) .Otherwise the patient is required to be operated every year to replace the battery .
S&T-CE009 Induction heating by high frequency power ouput
  25 KHz power generation for a very low impedance coil to work as instant induction heating for medical steralization applications.
S&T-Tele009 Incoming phone ring light flasher
  Phone line is connected through an opto isolator that drives a relay / triac through a transistor whenever ring is detected to switch on a 230V lamp to flash in accordance to ring.
S&T-EE007 Up and Down controlled speed of DC motor in Embedded System
  The speed of motor is directly proportional to the DC voltage applied across its terminals where the voltage is applied to control motor speed with Pulse Width Modulation wave. Here based on the pulse duty cycle provided by microcontroller the speed and direction of motor are controlled.
S&T-EE008 Automobile head light lamp intensity dimmer to control glare
  12volt, 10 watt automobile lamp dimmer by varying pulse width and driven by MOSFETS.
S&T-EE009 Remote speed control by thyristor trigger angle change with display of delayed firing angle
  Using a standard TV remote with IR sensors interfaced to a micro controller , reads the coded data from the remote to activate the corresponding output pin to change the time delay for the thyristor firing in 8 steps that drives with varying speed the induction motor.
S&T-EE010 A low cost microcontroller based system high performance AC motor drives
  Based on the principle of firing angle control of two thyristors connected in anti parallel is fed for the output to the control circuit. The firing angle would be manually adjusted to maintain the load power in the event of fluctuating AC voltage from high to low and vice versa.
S&T-EE011 High power AC lamp flasher for aviation obstruction indication purpose
  Aviation obstruction lamp flasher from AC source to warn air crafts for possible crash.
S&T-EE012 Micro controller based lamp life extender by ZVS (Zero Voltage Switching) using thyristor
  Incandescent lamps exhibit very low resistance in clod condition due to which it draws high current, resulting in failure on switching. Engaging two SCRs in anti parallel or a triac the switching on time can be precisely controlled by firing after detecting the zero cross point of the waveform.
S&T-EE013 Solid-state relay with ZVS properties analyzed on CRO
  A three phase solid state relay that incorporates three single phase units where each phase is controlled individually by a power triac with optional snuber network and an optically isolated triac driver with current limit by a constant current arrangement. The zero crossing feature of an opto-isolator ensures lower generated noise and sudden inrush currents on resistive loads and moderate inductive loads.
S&T-EE014 Cycle stealing of mains supply used to control ac power without generating harmonics
  Cycle stealing is a method to remove portions of full cycles/one cycle of an AC signal for controlling AC power across AC heater loads controlled by a set of switches interfaced to a microcontroller with a loaded programme in the memory as required by an industrial furnace.
S&T-EE015 Display turn table speed control for shops
  Low speed syncronous AC motor with programmed speed control in four steps using microcontroller and thyristor.
S&T-EE016 High power AC to DC by thyristor firing angle control
  DC power is controlled with zero crossing detectors and sending to the microcontroller to fire thyristors using the opto isolator. The ac power is applied to the bridge rectifier comprising of diodes ,triacs and SCRs to get controlled DC at the output.
S&T-EE017 Ultra fast acting Solid state circuit breaker
  The project is to shut down the power supply when it is overload. Conventional circuit breaker is based on thermal bimetal lever trip mechanism is very slow and the trip time is dependant upon the percentage of overload. Here the voltage sensed from a CT is compared against the preset voltage proportional to the current by a level comparator to generate an output for the contactor to trip the load.
S&T-EE018 A microcontroller based control of current source converter fed reversing induction motor drive by remote control. Ideal for exhaust fans to throw air out and bring air in by remote as desired
  The controller receives the Infrared Signal from the IR remote, the code of which is identified by the receiver that switches on/off the appropriate triac for a split phase induction motor to achieve desired direction.
S&T-EE019 TV remote operated curtain closer/opener
  Syncronous motor operated either direction movement of curtains remotely by standard TV remotes in commercial complexs.
S&T-EE020 Cyclo converter FOR Fundamental,F/2,F/3 using gate controlled thyristors
  The induction motor is a constant-speed machine. The difficulty of varying its speed economically constitutes one of its main disadvantages which is overcome by using a thyristor controlled cycloconverter that enables the speed to be lowered in steps by Microcontroller triggering a SCR bank of 8nos duly isolated by opto isolators for a F/2 & F/3 achieved by appropriate programme.F stands for frequency.
S&T-EE021 Energy meter to indicate billing in rupees for load wise or day wise
  Calculating energy details based on the load consumption in rupees and units with displays on a 16X2 LCD duly interfaced with the microcontroller.
S&T-EE022 Power factor control by automatically engaging approperiate number shunt capacitors for inductive load
  The time lag between the zero voltage pulse and zero current pulse duly generated by suitable operational amplifier circuits are fed to two interrupt pins of the microcontroller where the program takes over to actuate appropriate number of relays at its output for bringing shunt capacitors into the load circuit to get the power factor till it reaches 0.95.
S&T-EE023 Lagging and leading power factor display in industrial environment
  Display of lagging and leading power factor by measuring the time difference between voltage and the current in ac circuits
S&T-EE024 Detecting power grid synchronisation failure on sensing out of range frequency or voltage
  This paper presents the development of a microcontroller based islanding detection for grid connected inverter with very simple under/over voltage and under/over frequency islanding detection algorithms. The microcontroller monitors the under/over voltage and under/over frequency from utility grid and the processed value of voltage and frequency for turning on/off the relay between a grid connected inverter and the utility grid.
S&T-EE025 LED based street light with programmable intensity control using solar power from photovoltaic cells
  LED based street light with programmable intensity control using solar power from photovoltaic cells and a programmable microcontroller fed to a Mosfet for varying intensity during late nights automatically.
S&T-EE026 GSM based monthly Electricity energy meter billing with SMS and display to the user
  Domestic electricity consumed is displayed in rupee terms on daily and monthly basics to the user and billing details sent over GSM network form the user to the department for generating the printed bill..
S&T-EE027 PID/FUZZY Logic control for a brussless DC motor to run at the exactly entered speed
  Precise speed entered through a numeric key pad interfaced to a micro controller maintains the entered speed of a BLDC motor by sensing shaft mounted IR sensors working on a closed loop circuit by a half brige ac to Dc circuit comprising 2 SCRs and 2 Diodes .
S&T-EE028 Precise killometer calculation by underground cable fault detector
  Feeding a voltage through a fixed set of resistors representing distance in kilometers and resulting varying current fed to a ADC interfaced to a micro controller outputs the display in kilometers based on current flow at specific fault created by a set of switches for testing purposes.
S&T-EE029 Single phase induction motor soft start by stepped delay of reducing firing angle
  Charge and discharge of a capacitor at the switch on time and generating a saw tooth voltage is then compared by a comparator to reduce the firing angle from 180 degree to 0 degree progressively to achieve soft start of a induction motor.
S&T-EE030 2 Phase BLDC motor speed control using FUZZY logic control
  The Project consists of an input stage, a microcontroller processing stage, and an output stage. The input stage maps sensor to the appropriate membership functions and truth values, processing stage invokes them and the output stage results back into specific control output value.
S&T-EE031 Hall effect sensor based speed measurement of DC motor
  Hall effect controlled microcontroller based non contact type speed measurement system and display.
S&T-EE032 A PLD, (Programmable logic device) based BLDC motor operation
  The project uses a microcontroller and a EEPROM to store the logic configuration for operation of the motor which is driven by a motor driver IC. The input is set by a set of switches with display.
S&T-EE033 Precise illumination control of lamp
  Precise percentage of illumination entered through a numeric key pad is interfaced to a micro controller to maintain illumination of a lamp.The firing angle would be automatically adjusted to maintain the load power to the lamp such that the entered intensity matches the required one.
S&T-EE034 A single-chip microcontroller based real-time PWM inverter
  A single-chip microcontroller based real-time PWM inverter using PWM IC SG3524 and SCR for charging purposes using firing angle control with auto changeover switch from mains supply to inverter supply in the event of mains failure.
S&T-FM011 A low cost long range FM transmitter with audio modulation
  A low cost FM transmitter with audio modulation consisting of 106 MHz oscillator circuit, VFO and RF power amplifier connected to a tuned Yagi antenna to cover about 5 km line of site distance.
S&T-Light040 Rhythm following flashing lights
  Sound signals sensed by condenser microphone are amplified to feed to triacs to drive the bulbs or LED via opto isolator to increase or decrease the lamp intensity according to the music level.
S&T-Light041 Mains operated LED light in string
  A string of LED’s are made to operate at 230V AC by series capacitor drop and current limit resistor and then being rectified to DC for maintaining a safe operating voltage for the LEDs.
S&T-MC087 PWM fed MOSFET controlled street light auto intensity control in 8 steps
  White Light Emitting Diode (LED) replaces HID lamps by engaging a programmable microcontroller that controls intensity by pulse width modulation duty cycle which enables energy saving during late nights considering low traffic density.
S&T-MC088 Becon flasher using microcontroller and PWM fed MOSFET
  Slow flashig of LED lamps at one second interval for becon light warning system at sea shores.
S&T-MC090 Industrial drafting fan in stepped speed control using BLDC motor
  Eight step control of BLDC motor speed by microcontroller fed MOSFET for meeting industrial needs.
S&T-MC091 Discothec light stroboscopic flasher
  Cluster of high power LED replacing strboscopic light flasher driven by microcontroller controlled solid state power switch.
S&T-MC092 Automatic alternate supply controller from 4 different sources to ensure no break power
  The main scope of the project is to consume the power from supply mains, generator, and wind power and solar optimally by using appropriate programme through microcontroller in most cost effective way.
S&T-MC093 Auto selection of Fan available from multiple supply sources
  Un-interrupted supply to critical cooling fans from any available supply source.
S&T-MC094 Random on/off of lamps to deter burglars for locked houses
  Automic switching On/Off of lamps at random intervals in locked house to deter burglar attempt
S&T-MC095 Automatic irrigation system on sensing soil moisture content
  The circuit comprises of sensor parts built using op-amp IC LM324 and are configured here as a comparator. Two stiff copper wires are inserted in the soil to sense whether it is dry. The Microcontroller turns the motor ON and OFF based on sensors condition that is dry or wet respectively. .Sensor signals are operated with the control of software that is stored in ROM of the MC.
S&T-MC096 Laser beam controlled garage door opener
  Hand held laser light beam sensed door opener using microcontrollerfrom a long distance.
S&T-MC097 Low cost Programmable logic control (PLC) for industrial automation in repetative nature of work
  Objective is designing a microcontroller based programmable time setting by the user through microcontroller architecture loaded with an application program. Switches are provided for set mode, auto mode , manual mode and time change mode. Machines will run based on/off sequentially in auto mode in default time settings or set mode time setting or manual mode depending on the user’s need and flexibility.
S&T-MC098 Automatic washing machine control with manual override
  Sequential operation of washing machine having programable time for each operation and manual also operation alternatively.
S&T-MC099 Automatic Wireless health monitoring system in hospitals for patients
  Monitoring patient health remotely in hospitals over wireless from the patient bed to the doctor’s chamber by RF with LCD display at both ends and optionally an alarm on critical situation.
S&T-MC100 Transformer temperature monitoring by wireless to control room
  Temperature rise of distribution temperature sent over RF on realtime basis to the control room for approperiate action.
S&T-MC101 Precise temperature control for incubators used in hospitals for the pre born child growth
  Microcontroller observes temperature readings taken from display unit and compares with the keypad programmed temperature value to control the heater (ON/OFF). Here the controller continuously polls the temperature with certain regular time intervals and displays over the 7_segment display unit for the Microcontroller (Intel 8051) to enable the whole operation by executing the program.
S&T-MC102 Temperature warning system for Nuclear plants
  Early waring alarm system of temperature rise in Nuclear plants to avoid future dissasters.
S&T-MC103 Passenger counter in public transport to alert the driver for excess entry IN/OUT
  This application keeps the database of the number of persons entering as well as exiting. 555 timer driven 38 KHz signal from LED’s gets interrupted on to the IR receiver to sense the person entering as well as exiting. This signal is fed to AT89C51 micro controller for analyzing and control purpose with LCD displays on the number of persons in and out.
S&T-MC104 Overload alarm warning system in a passenger lift with number of occupants indication
  2 digit 7 segment LED display of occupants ,driven from microcontroller along with warning system on excess people   in a lift
S&T-MC105 Smart card enabled employee identification for secruity purpose
  The project is developed to identify the employees with ID cards over the campus, where a module is provided to read the ID number from card. Whenever card ID number in the card is matched with the inbuilt ID number in the code then LCD display would indicate that the card being accepted with a relay used to enable opening and closing a door after a delay to avoid the next one to enter .
S&T-MC106 Smart card based door security system
  Security area authenticated entry system by individual smart card identification and reading system.
S&T-MC107 PC managed home automation system using embedded technology
  This project external electrical load applications controlled with the help of PC. PC is connected to microcontroller through MAX 232 level shifter, ULN (Driver) is used to drive the relays for connecting to external devices. DB (RS-232) connector is used to connect to PC com port.
S&T-MC108 Portable coded wireless message communication between two parties secretly with LCD display
  The aim of the project is to send encrypted text message transmitted through RF by using Micro Controller and received at receiver which is decrypted by another Micro Controller where message is displayed over the LCD display. Transmitter gets data from a standard computer keyboard and encrypts with a private algorithm. At receiver end the Micro controller decrypts it with the same algorithm and displays the data on LCD.
S&T-MC109 PC based wirelss notice board
  Text message from a computer keyboard attached to a microcontroller is encrypted with LCD display to have decrypted message at receiver end all controlled by bidirectional RF cmmunication
S&T-MC110 Dynamically changing signal light time allotment in street junctions based on traffic density
  The project is to solve traffic congestion by a dynamic and automatic traffic light control system based on the traffic density using appropriate system and hardware. IR sensors across the road used to monitor the length of vehicles blocking the road traffic. The signals from the IR receivers are fed to the Microcontroller to follow different time for different level of traffic.
S&T-MC111 Remote controlled domestic appliances control
  A typical TV remote sends certain coded infrared data which is then burnt to a micro controller to drive desired output while same signal is received from an IR receiver interfeced to it.The output from the microcontroller drives the load through relays or opto isolators and triacs. All the buttons of the remote can be used for as much number of loads to be operated.
S&T-MC112 Password based circuit breaker control to ensure electric line man's safety
  The micro controller based door locker is an access control system that allows only authorized persons to access a restricted area. The system is fully controlled by the 8 bit micro controller AT89C51 which has a 2Kbytes of ROM for the program memory. The password is stored in MC can be changed at any time.
S&T-MC113 Password based jail chamber gate operation by motor
  Numeric keypad interfaced microcontroller to sense exact password for door opening and closing in high secruity area.
S&T-MC114 Multiple ON and OFF time programmed industrial load
  Time Operated Electrical Appliance Controlling System is a reliable circuit that takes over the manual task of switch on/off the electrical devices with respect to time. It has an Inbuilt Real Time Clock (RTC) which tracks over the Real Time. When this time equals to the programmed time, then the corresponding Relay for the device is switched ON. Multiple time programing is also available.
S&T-MC115 Automatic bell system for schools/ colleges
  Period over class room bell system for each period using microcontroller and real time clock.
S&T-MC116 Missile detection by ultrasonic means and activate the destroyer
  This ultrasonic proximity detector comprising independent battery or AC powered transmitter and receiver sections make use of a pair of matched ultrasonic piezo ceramic transducers operating at around 40 kHz each. This circuit is used in getting reflected signals from the object ahead to feed that by a program to the microcontroller. Opamps are used to amplify the weak signals received upon reflection by the obstacle by the receiving ultrasonic transducer sent by the transmitting one, to switch on appropriate load.
S&T-MC117 Automatic gate opening system for parking lot
  Sonar sensor based microcontroller controlled parking gate opening system for automatic entry at the gate.
S&T-MC118 Street lights that glow for 1/2km only on detecting vehicle movement
  Emitting Diode (LED) replaces HID lamps by engaging a programmable microcontroller that controls intensity by pulse width modulation which enables energy saving during late nights considering low traffic density. The pulse width becomes very narrow on sensing no movement of vehicles. As the vehicle forwards, the intensity goes on increasing for few lights ahead, and as it passes away the intensity goes on falling.
S&T-MC119 Tampered energy meter monitoring conveyed to control room by wireless communication
  The main scope of this project is to send message from any tampered energy meter to be received by the control room by means of RF communication. The receiving signals are then fed to a microcontroller, programmed to recognize those tampered meters to provide a display at the control room with buzzer sound on each time it is tampered.
S&T-MC120 Distance measurement by ultrasonic means
  This ultrasonic proximity detector comprising independent battery or AC powered transmitter and receiver sections make use of a pair of matched ultrasonic piezo ceramic transducers operating at around 40 kHz each. This circuit is used in getting reflected signals from the object ahead to calculate the distance by taking into consideration the velocity of sound by a program fed to the microcontroller.
S&T-MC121 Portable Programmable Medication Reminder
  The project takes care of reminder need of people who forget to take medicines in time. Key pad entry stores the relevant information in an exclusive EPROM with several timings based on a RTC. At the programmed time the message for the medicine is displayed over a 16 digit LCD display together with a buzzer sound to alert the person for taking the appropriate medicine.
S&T-MC122 Time operated motor control with LCD display
  Specific timed programmed pump motor operation by microcontroller bases RTC, real time clock
S&T-MC123 User programmable password based hotel room door lock
  The microcontroller based Door locker is an access control system that allows only authorized persons to access a restricted area. The system is fully controlled by the 8 bit micro controller AT89C51 which has a 2Kbytes of ROM for the program memory. The password is stored in another dedicated EPROM which can be changed at any time unlike a fixed one burnt permanently on to the microcontroller.
S&T-MC124 Password based secured area entry with wrong attempt alarm
  Password stored in dedicated EEPROM by user entry keypad is used to lock or unlock the door, by a motor and an alarm is sounded in case of wrong password attempt.
S&T-MC125 Monitoring Serial Communications in MC Based Embedded Systems using CAN, Control Area Network. Three microcontrollers communicating with each other over pair of wire
  As the number of microcontrollers embedded in a product increases the solution for communication among them preferred serially. The paper describes a message based monitoring tool using the RS232 Rx Tx bus features of the MC to communicate between 3 MCs.
S&T-MC126 CAN based security system
  Message based monitoring tool using the RS232 Rx Tx features of the MC to communicate between 3 Microcontrollers, one for input, one for display and the other for some load in  CAN protocol
S&T-MC127 Four telephones in parallel but still accessed by only one user at a time to maintain secrecy
  This Project can be used in houses and offices in which more than one telephone is connected in parallel through a single telephone line. The project is used to connect a maximum of four telephones in parallel. When any one of the phone is lifted, all the other lines are disconnected from the telephone line.
S&T-MC128 Using TV remote as a cordless mouse for the Computer
  A typical TV remote sends coded infrared data that is read by a sensor which is then burnt to a micro controller the output of which shall drive desired operation through serial port connection as conventionally performed by the PC Mouse. All the functions are monitored and controlled by the 8 bit microcontroller AT89c52 /51.
S&T-MC129 Human sensed automatic door opening system
  Automatic door opening by sensing any approaching human being by piro IR sensors interfaced to a programmed microcontroller that drives a motor through motor driver IC with locked rotor protection some system for door operation.
S&T-MC130 Movement sensed burglar alarm system
  PIR controlled microcontroller based movement detection system with auto alarm generation.
S&T-MC131 Railway level crossing gate control through SMS by the station master or the driver
  Raiway level crossing gate motor ,controlled by the station master or the engine driver through GSM modem interfeced to microcontroller for deriving an output to dive a relay for the gate motor operation.
S&T-MC132 DTMF based remote industrial load and/or agricultural pump control
  The main scope of this project is to send digit commands from one cell phone to be received by another cell phone to receive the tone mode commands which are then DTMF (Dual Tone Multi Frequency) decoded. The receiving cell phone codes are then fed to a microcontroller which is programmed to recognize those codes for operating any kind of load duly interfaced through relay drivers and relays (or motor driver and motor) as per the sent command from sender’s mobile.
S&T-MC133 Cell phone/landline operated alarm system for help in case of emergency
  Cell phone controlled microcontroller based assistance ssytem for multiple needs.
S&T-MC134 Synchronized traffic junction signaling (Get green signal all-through at any street junction)-A new concept to ease traffic congestion in metros 
  All the traffic junctions in a main road are synchronised for signal lighting such that the vehicle gets green signal at all the junctions while moving at a normal speed.This is achieved by interconnecting through Rs232 protocall all the individual microcontrollers used at each junction to keep tarckling and then adjusting the time accordingly so that once the moving vechile reaches the junction it gets green signal.
S&T-MC135 Theft intimation of the vehicle over SMS to owner who can stop the engine remotely
  Theft intimaton of the vehicle over sms using GSM modem to the owner while unauthorised door entry is made. Owner can send command through his mobile to stop the engine by activating the relay interfaced to a microcontroller along with the GSM modem used for the purpose.
S&T-MC136 Automatic locking system in case of burglary with intimation to police station
  G SM modem interfaced microcontroller based automatic door locking incase of forced action with SMS to the designated police station number.
S&T-MC137 Open loop speed control of servlliance camera panning from PC
  Using pulse width varying technology so generated by the PC with Rs. 232 interface through a Micro controller enables the speed control of motor from the Pc by a motor driver IC controlled from the microcontroller.
S&T-MC138 PC based light intensity control
  Serial port controlled PWM based light intensity monitoring system from PC.
S&T-MC139 Flash Flood intimation over GSM network to the station master
  High water level detector interface to micro controller that outputs a signal to a GSM modem for sending a signal to the station master to direct the train driver to stop the train.
S&T-MC140 SMS based intimation and calling over GSM network for emergency assistance
  GSM modem interfaced microcontroller based automatic message display incase of forced action with SMS to the designated emergency number
S&T-MC141 RFID guided automatic parking permission for vehicles in cellar at commercial complexes
  RFID card swiped over the RFID card reader by the vehicle driver enables the motor interfaced through the driver IC to the controller to open the gate for vehicle entry.
S&T-MC142 RFID security access control system
  RFID card to reader to read the data present on the card and compares the same to match the built in data for stattus display and unlocking the door
S&T-MC143 Sending an SMS for electrical load control that re-sends an acknowledgement of the status
  An sms sent through the cell phone to a distant location GSM modem for electrical load interfaced from a micro controller through relay and relay driver to switch on and switch off the same with acknowledgement sent back to the sender on sms upon the action taken and the status of the load.
S&T-MC144 GSM based supervisory control and status acquisition of industrial loads
  Mobile message sent to another sim loaded GSM modem interfaced to microcontroller to drive relays to control the home appliances with a confirmation upon the status of the load.
S&T-MC145 Mobile phone keypad sensed password entry for door opening
  DTMF tones generated by any cell phone is received by an audio sensor interface to a dtmf decoder the output of which is fed to the microcontroller that outputs a relay for door lock operation.
S&T-MC146 Cell phone /landline based circuit breaker
  Remote controlled,password based circuit breaker for industrial load protection.
S&T-MC147 Large digit display of dialled telephone numbers for std billing centers
  Dialed telephone numbers are picked up by a dtmf decoder to feed to a micro controller to drive ten numbers seven segment LED displays for better visibility.
S&T-MC148 Closed loop feedback operated motor speed control
  This project uses the IR transmitting and receiving technique by reflection of modulated IR rays from any rotating object such as a motor shaft to send interrupt signal to a programmed microcontroller to enable display of the speed. The display can either be a LCD or simple 7 segment LED type. This becomes a contact less tachometer.
S&T-MC149 RFID based attendance system
  RFID card with details of the employee keep tracking of their attendance while swiped on the RFID reader interfaced to a microcontroller with LCD display for indication.
S&T-MC150 RFID based passport details
   Identitying the passport holder through data stored in RFID card by retriving the same through a reader duly interfaced to the microcontroller by a LCD display.
S&T-MC151 Automatic Dialing to any telephone using I2C protocol on detecting burglary
  User Programmable telephone number storing by key pad entry enabling auto dial to the police Station or the person concerned in the event of robery.
S&T-MC152 Password protected bank locker system with intimation to the owner through cell phone/landline
   User Programmable telephone number storing by key pad entry enabling auto dial to the person concerned in the event of robery.
S&T-MC153 Life cycle testing of electrical loads by down counter
  A presetable counter with key pad entry that counts down from the set number till it reaches zero with relay operation connected to a load that switches ON & OFF is used for life cycle test of the gadget under test say a lamp to determine its life.
S&T-MC154 Three digit preset counter warning sytem for limit cross operation of industrial loads
  A countdown timer with programmable features for meeting industrial load schedule maintainence.
S&T-MC155 GSM based energy meter billing with load control
  The project is to develop a wireless energy meter reading and load control. The reading of the energy meter is also sent by to any cell phone by a message through GSM modem which also receives commands from the cell phone to control the electrical loads.
S&T-MC156 Stamp value calculator for post office
  Calculating the weight of the letters & value by a balancing arrangement is used to control a potentiometer the output of which is fed to an ADC interfaced to microcontroller having a display
S&T-MC157 Dish positioning control by stepper motor /geared motor
  Programmed microcontroller to enable 180 degree movement of the dish by using a motor for adjustment of the best signal to be received from the satellite.
S&T-MC158 Railway track security system
  The system detects for breakage /crack in railway tracks using line loop current break to sense the same to send interrupt to the controller to send an SMS to the station master through GSM.
S&T-MC159 Sun tracking solar panel
  With RTC (real time clock), microcontroller and a stepper motor to rotate the solar panel during day, in steps from zero to 180 degrees to track the sun for maximum power delivery .
S&T-MC160 Wireless Electronics Notice Board
  The microcontroller receives the message from transmitter through GSM interface to be displayed on the LCD at user end interfaces to the microcontroller.
S&T-MC161 Object counter with Seven segment display
  An IR sensor receives the interrupt pulses to count and send the data to microcontroller for displaying it on 7-segment LED’s.
S&T-MC162 Mathematical Manipulation of Pure Sine Wave Inverter using microcontroller to develop adaptive PWM (Pulse Width Modulation) under DSP
  Using DSP based program using microcontroller for generating sine wave by 'H' bridge MOSFET bank for 300 watts output with controlled battery charging and auto change over.
S&T-PIC021 RFID based device control & authentication
  RFID card swiped over the card reader by the vehicle driver enables the motor interfaced through the driver IC to the controller to open the gate for vehicle entry .
S&T-PIC022 Vehicle theft intimation to the owner on his cell phone by GSM
  Theft intimaton of the vehicle over sms using GSM modem to the owner while unauthorised door entry is made. Owner can send command through mobile to stop the engine whose ignition is dissabled through a relay fed from the microcontroller which gets command from the GSM modem.
S&T-PIC023 Street light that glows showing the road ahead for km only on sensing vehicles or any movement
  Emitting Diode (LED) replaces HID lamps by engaging a programmable microcontroller that controls intensity by pulse width modulation which enables energy saving during late nights considering low traffic density. The pulse width becomes very narrow on sensing no movement of vehicles. As the vehicle forwards, the intensity goes on increasing for few lights ahead and as it passes away the intensity goes on falling.
S&T-PIC024 Density based traffic light timing control
  The project is to solve traffic congestion by a dynamic and automatic traffic light control system based on the traffic density using appropriate system and hardware. IR sensors across the road used to monitor the length of vehicles blocking the road traffic. The signals from the IR receivers are fed to the MC to follow the program with the time as desired.
S&T-PS022 Step up 6 volt DC to 12 volt DC using 555 timer
  A 555 timer used in astable mode outputs twice the AC from 6 volt DC and then by voltage multiplication to generate 12 volt DC by capacitor charge pump method.
S&T-PS023 Solar power charge controller
  A set of comparators used to drive MOSFETs for bypassing the solar panel power in the event of excess charging. Also providing overload and under battery protection to the load used.
S&T-RBT037 RF controlled by hand held unit, laser beam managed bomb-diffusing robot
  In this RF remote control is used to control a robot that has the advantage of adequate range (up to 200 meters) besides being omni directional. The micro controller used here has latched outputs and as such one does not have to keep the buttons on remote control pressed for more time, thus enhancing battery life. A laser beam is actuated after the robot reaches the suspected site on to the object to diffuse the bomb.
S&T-RBT038 A land rover remotely controlled by hand held IR transmitter
  This project uses a robot to extinguish a fire. It is the Robot that can move through any path by IR control and while it is required to face a fire then it extinguishes with help of a Blower fan / or a water pump actuated by the remote. By using IR sensors it can detect the command signals transmitted.
S&T-RBT039 IR controlled sage robot
  Land rover robot that moves by hand held TV remote infrared based ,being driven by a set of 2 motors duly interfaced through motor driver IC.
S&T-RBT040 Line following robotic Vehicle that does not require any microcontroller interface or program
  An array of two pair of photo sensors comprising IR transmitter and photo diode is fitted in front of the car to detect a black path as well as any turns in the path. By reading the outputs from each of the two sensors, Darlington pair of transistors is biased. Two DC motors are connected to the collector of the transistor TIP122. The motors are able to turn the steering left or right, depending on what logic signal the sensor sends.
S&T-RBT041 Cell phone operated robotic vehicle
  Robotic vehicle that can be operated from any where using cell phone sent commands.Once the contact is established over dialling the cell phone mounted on the robotic vehicle it accepts the tone commands thereafter for the operation of the vehicle.
S&T-RBT042 Cell phone operated sage robot
   Digit commands from one cell phone sent to another cell phone mounted on the robot to receive the DTMF (Dual Tone Multi Frequency) mode commands to feed to a microcontroller, to operate 2nos DC motors through motor driver IC for any direction movement.
S&T-RBT043 War field land Rover that alerts on sensing planted Land Mine ahead
  Wirelessly controlled land rover mounted with metal detecting sensors to generate alarms on sensing planted land mine.The movement is wirelessly controlled by a hand held RF transmitter to send commands to the RF receiver mounted on the land rover.
S&T-RBT044 War field sage robot that alerts on sensing planted land mine ahead
  Remotely controled robot using RF mode with encoder nad decoder duly interfaced to a pair of microcontrollers for movement and metal detection by a metal detector (land mine detector) being actuated after the robot reaches the suspected site.
S&T-RBT045 Bomb displacing robot with tension controlled soft catching arm
  A moving robot control wirelessly to reach the suspected bomb site to relocate the bomb at different place while handling the same carefully by a soft catching arm duly controlled by interrupt monitored motor to avoid extra pressure on the susspected object for safty reasons.
S&T-RBT046 Wireless operated Fire extinguisher vehicles with water jet spray
  Fire extinguishee vehicle loaded with water tanker and pump controlled remotely over wireless to throw water jet to the fire.The movement and the pump control are wirelessly controlled by a hand held RF transmitter to send commands to the RF receiver mounted on the fire extinguisher vehicle.
S&T-RBT047 War field spying Robot with night vision wireless camera
  A RF based moving vehicle mounted with wireless night vision camera controlled remotely over wireless to send real time pictures of enemy activities in war field.The movement is wirelessly controlled by a hand held RF transmitter to send commands to the RF receiver mounted on the moving vehicle.
S&T-RBT048 Line following robotic Vehicle using microcontroller interface
  Using IR reflected light falling on photodiodes form as input to IO parts of MC to drive a robotic vehicle motor through motor driver IC in a specified black path by reflection from the white surface and then by disabling any one motor in the event of reflection being stopped while going away from the blackpath to take turn till the reflection resumes.
S&T-SC008 IR obstacle detection to actuate load
  38 KHz IR signals generated by 555 timer feeding IR diode received by tuned IR receiver generates an interrupt while obstructed to actuate a load.
S&T-SC009 Automatic dusk to down (Evening on to morning off)
  LDR input compared op amp turns on the appliances on through relay at falling light intensity in evening and off at the morning light.
S&T-SC010 Thermister based tempurature control without micro controller
  Negative co-efficient thermister used along with an operational amplifier used as comparator to actuate a relay in the event of temperature going out of range.
S&T-SC011 Over voltage or under voltage alert system