Electronic Project Volume - 01

Section A : Construction Projects
S.No
 Products
Page No.
01 Add This electronic Alarm Delay To Your Alarm Clock 09
2 Add This Low -Cost Tuning Indicator To Your Radio Receiver 10
03 Make Yourself This Low -Cost Solid state Emergency Light 15
04 Automatic Polarity Changeover For Multimeters 16
05 Make Yourself This  Crystal -controlled electronics Digital clock 18
06 Make Yourself This Function Generator Using A single  27
07 proportional Power Control Using SCR 31
08 Make Yourself This Intruder Alarm  36
09 Some tips For Servicing Hearing  Aids 37
10 Make  Your Own Manual AC Main Regulator 39
11 Make Yourself This Proto-Experimenter For Bread boarding IC Circuit 43
12 Make Yourself A Solid state Starting Time Delayer 45
13 Make Yourself This Rechargeable Ni - Cd Torch 47
14 Build This Low -Cost Power Supply For Digital ICs 48
15 Protect Your Alarm  By Automatically Silencing After A Present  Delay 49
16 Make Yourself This Stereo Tape Cassette Player  50
17 Control Water Level  In Overhead Tank Automatically 55
18 Make Yourself Light Beam controlled Magic Toggling Switch  For Remote Control 57
19 Build This Versatile intercom  58
20 Make Yourself This Electronics Timer With Audio  Alarm  62
21 Convert Your Manual Voltage Stabilizer At Nominal Cost  63
22 Make Yourself This high /low Voltage Cutout To Suit Any Delay Any Relay  71
23 Make Yourself This Musical Melody Synthesiser 73
24 Make Your Own Automatic Voltage Regular  78
25 Add This Battery State Indicator  To equipment  83
26 Make Yourself This 3-Band Radio Receiver using BEL  700 IC 84
27 Make Yourself This Highly Versatile DC Power Supply  87
28 Make Yourself This Boatman's Puzzle  97
29 Add This Current Limiting Facility To Your DC Power  Supply  99
30 Make Yourself This Versatile touch  Plate  100
31 Make Yourself This Musical Kaleidoscope  102
32 Make Yourself This Pulse  Generator Using  ICs 103
33 Make Your Own Timer Interval Setter 105
34 Build Your Own AC Main Voltage Regulator Using An IC 106
35 Add This Stereo Cassette Preamplifier To Your Stereo System 115
36 Add This 'Second Blinker'  To Your Digital Clock 117
37 A Ladder Crystal Filter Receiver For The Beginner 119
38 Make Yourself A Reverb Amplifier 121
39 Simplified Design Of Power Supply Transformer  123

SECTION - B   CIRCUIT    IDEAS
1 Two - Way Intercom  12
2 Simple  LED Continuity Checker  12
3 Wait Please '  Indicator 13
4 Transmitter  13
5 Exclusive Or ' And 'Or ' Gates Work Without  Power Supply  14
6 Semiconductors  Tester  14
7 Split Phase Power Supply  21
8 A  Photoflash  Slave For Electronic Flash  21
9 Portable 50 Hz Source  22
10 Automatic Rise And Fall Siren  22
11 Electronic Organ  23
12 Self - Regulating  Battery Charger With Short  - Circuit  Protection 23
13 Miniature  Hearing Aid 24
14 Changeover Switch With Built  - In Priority  24
15 Binary State Indicator  24
16 A Universal  Schmitt Trigger 25
17 Mains Lamp Flasher With Added Attractions  25
18 Psychedelic Lights  30
19 A Fold over Circuit (Improved Dynamic Range Without Sacrificing Linearity)  33
20 A Simple Security system 33
21 Multi Channel Intercom 34
22 Electronic Organ  34
23 Rain Alarm  35
24 A M Transmitter 35
25 Metronome  40
26 Load Current Capacity  40
27 Electric Parrot  40
28 Battery Level Indicator 41
29 IC 555 As Analog Switch For Positive Signals  41
30 Low - Cost Telephone Amplifier  42
31 Simple Electronic Multimeters  65
32 Delay Switch  65
33 Auto Test ' Circuit For  Displays & ICs 66
34 Water Level Indicator  67
35 Easy - To - Make  Electric Guitar 67
36 Light Activated Switch  67
37 Using Loudspeaker  as  A Microphone  67
38 Electronic Method To Measure Velocity Of Sound 68
39 Simple Electric Lock  69
40 Tweeter Bell  69
41 Diode Tester  69
42 Simple Clock Generator For TTL Work  70
43 One - Transistor Gramophone  Transmitter  70
44 Water Level Controller  70
45 Simple Power On Reset Circuit  77
46 Dual Function Meter  90
47 Light To Frequency Converter 90
48 Voltage To Frequency Converter 90
49 Bicycle Turning Indicator 91
50 Emergency Lamp  91
51 Polarity Or Null Indicator 91
52 Hi - Fi Amplifier  For Ceramic Pick - Ups 91
53 Regulated DC Power Supply  91
54 LED Transistor Tester  92
55 Light Activated Alarm  93
56 Counter Using Calculator  93
57 Emergency Light 94
58 Variable Frequency As table Multi vibrator - Using NAND Gates  94
59 Neon Lamp Leakage Tester  94
60 Audio Tester 95
61 Toy Telephone  95
62 Stereo Balance Indicator  95
63 Overheat Indicator 95
64 DC Voltage Level Monitor Indicator  96
65 MW Transmitter 96
66 Inexpensive LED Bar graph Voltmeter  101
67 Low Cost Synchronous Switching Heat - Staging Controller  108
68 Single Phase Prevented  109
69 Dry Cell Recharge For Three Cells  109
70 Electronic Flasher  110
71 Testing Of SCRs And Triac On Multimeters  110
72 Bitable Touch Switch  111
73 Battery Eliminator With Emergency Light  111
74 Digital Electronic Counter  111
75 LED Flasher  112
76 Variable Regulated Voltage Battery Eliminator  113
77 Hum Reducing Circuit  113
78 A Simple Soft - Start Circuit  114
79 Chirping Birds' Circuit  114