Electronic Project Volume - 24

Section A : Construction Projects
S.No
 Products
Page No.
1. Car Security System With Remote Control 3
2. A Tutorial On 89C51 Development kit 6
3. PC Based Programmer For The AT89C51 Microcontroller 37
4. DTMF Remote Control System 45
5. Programmable Logic Controller 54
6. Automated Car Parking System 59
7. Simple 32-Bit Relay Card For PC's Parallel Port 65
8. Temperature Measurement using Transistor As Sensor 71
9. Digital Clock with Seconds And Alarm Time Display 74
10. Programmable Light Effects Generator 79
11. Door-opening Alarm with Remote Control 85
12. Microcontroller - Driven Data Display  88
13. Simple Multichannel Remote Control System 99
14. Mictoprocessor-Controlled Thermometer 104
15. DTMF 8 Channel Switching via Powerline 111
16. Two - In - One Stereo Amplifier 115
17. Multi-feature Emergency Light 119
18. Muliple Device Switching Using PC's Parallel Port 122
19. Proportional Load Contol Using PC 127
20. Binary -To-Hexadecimal Decoder 131
21. Controlling A 7-Segment Display Using PC's Parallel Port 135
22. Economical UPS For Cordless Phones 139

SECTION - B   CIRCUIT    IDEAS
1 Intelligent Water Pump Controller with Water-Level Display 145
2 Precison 1 Hz Clock 146
3 Blue Led Night Lamp with Back-Up 146
4 Infrared Proximity Detector 147
5 Computerised Universal Timer 148
6 Number Guessing Game 150
7 Water Level Indicator 151
8 Ultra Bright Led Lamp 151
9 Garage Light And Security Control 152
10 PWM-Based Speed Control For DC Motors 153
11 Led Sand - Glass Timer 154
12 Three Colour Display using Bicolour Leds 155
13 Versatile Emergency Light Using Florescent Tubes 156
14 Electronic Security System 157
15 Clap Based Switching For Devices 158
16 Lead Acid Battery Charger with Voltage Analyser 159
17 Keypad Control For Multiple Appliances 160
18 Wireless TV Headphoner Circuit 161
19 Automatic Water Pum[ Motor Controller 162
20 Electric Shock Gun 164
21 Anti-Theft Alarm For Vehicles 165
22 Multi-Switch Doorbell with Indicators 166
23 Song Number Display 167
24 Low-Range AM Radio Transmitter 168
25 0-100C Temprature Detector 168
26 Precision Null Detector 169
27 Sound Scanner 170
28 Clap Switch 171
29 Infrared Remot Control Timer 171
30 Earth Fault Protector 172
31 DTMF Receiver IC MT8870 Tester 173
32 Pulse Generator 174
33 Intruder Detector Using Laser Torch 175
34 Simple FM Reciever 176
35 Parallel Telephone With Secrecy And Call Prevention 177
36 PC - Driven Led display 178
37 Solidstate Signal Lamp 179
38 False Triggering Eliminator For Timer 555 180
39 Transistor Tester 180
40 Voltage - Based Controller For Switches 181
41 Burglar Alarm System 182
42 Low Coast Hearing Aid 182
43 Over-/Under-Voltage Protection Of Electrical Appliances 183
44 Touch Bell 184
45 Doorbell With Security Feature 184
46 Resistance Measurement Using Sample And Hold Method 185
47 Sensitive FM Transmitter 187
48 Vehical Security System 187
49 Mobile Phone Multipower Unit 188
50 Telephone Reciever 190
51 Washing Machine Motor Controller 191
52 Simple touch Sensitive Switch 192
53 Remote Operated Musical Bell 192
54 Smoke Extractor 193
55 Auto Snooze For Digital Alarm Clocks 194
56 Alarm Using Your Own Voice 195
57 Flashing Headlight For Mobikes 196
58 Electronic motor Starter 197
59 Wireless Door Opening Alarm 197
60 Non - Contact Power Monitor 198
61 Mosfet - Based Preamplifier FM Radio DXing 199
62 Electrolytic Capacitor Tester 201
63 Key Chain Light 202
64 Automatic Light Lamp With Morning Alarm 203
65 Fan On/Off Control By Light 204
66 Intercom With Musical Ringtone 205
67 Led Torch 206
68 Touch Dimmer 206
69 Experimental Study Of Switched- Capacitor Circuit 207