Electronic Project Volume - 07

Section A : Construction Projects
S.No
 Products
Page No.
01 Quick 741 And  555  Tester 9
02 Object Counter  Using CMOS  ICs 14
03 A Game  Of  Steady Hands 19
04 Envelope Follower For Guitars And Organs 24
05 Automatic Tank Filling Cum Pump House  System 28
06 Remote  Control For T V And Hi - Fi 33
07 V H F  T V Booster 37
08 Redio  Cassette Recorder  (Teo  - In- One ) 43
09 12 Tune  Musical Doorbell 53
10 Car  Clock Module 61
11 Video  Car  Racing Game 67
12 Sound Activated Flash For ' Stop Action ' Photography 76
13 12 W + 120W  Stereo Amplifier 81
14 Stereo Control Cum Preamplifier For 120W + 120W Amplifier 87
15 Multiple Program Timer Using Sinclair  Spectrum  Micro 96
16 10-Band Graphic  Equaliser  101
17 Inexpensive  TV Antenna 108
18 Versatile Tester With Audio Indection 112
19 STD/ Local Bar To Prevent Overcharging 116
20 An  LED Speedometer For Two Wheelers 119
21 Traffic Light Control System 122
22 Digital Techometer Using Sinclair Spectrum 133

SECTION - B   CIRCUIT    IDEAS
1 Two - Way Doorbell With Memory 11
2 Low  Resistance Measuring  Meter 11
3 Miniature  Running  Lights 12
4 Zener Diode Tester Cum Calibrator 12
5 Multiway  Switches 13
6 LED  Direction Indicator 21
7 SW  AM  Booster For Valve  Radio 21
8 A  Simple Tempreture  Controller 22
9 Simple Sawtooth Generator 22
10 Electronic  Phone Lock 27
11 Condenser  Mike Amplifier 31
12 Field Failure Protection For DC Motors 31
13 Simple  AM Radio Transmitter 36
14 Inexpensive  Electronic Switch For Audio Signal 41
15 Boatman's Puzzle Game Using Signal IC 41
16 4-Bit Binery To BCD Converter 42
17 Simple Flasher Using UJT 51
18 Bull  And Cows Game 51
19 VHF  TV  Modulator 52
20 Simple Ni - Cd Battery Charger 52
21 Troublesome Tubelight 55
22 Overvoltage Cut out Using IC 723 55
23 Running Light Effect 56
24 Car Buglar Deterrent 56
25 Electonic Congo 56
26 IC Speed Control For Small DC Motors 57
27 Low - Cost Transistorised  Intercom 57
28 Heads Or Tails Simulator 58
29 A  Simple AF Filter 58
30 Automatic Bathroom / Toilet Light 59
31 One Second Master Oscillator 59
32 Visual Indictor For Electronic  Doorbell 60
33 Light Pulse  Activated On / Off Switch 64
34 Electric Fence / Window  Charger 65
35 Automobile  Flasher 65
36 Time With On / Off  Delay 65
37 Blown Fuse Indicator 66
38 Neon Indicators For AF Amplifier 66
39 Simple  Logic Probe 71
40 Self  Resetting LDR Alarm 71
41 Back - Up  Supply  For Calculators 71
42 A Novel Tank Level Controller 72
43 Burglar  Alarm 73
44 Power  'On' Cum Blown Fuse Indicator Using Single  LED 73
45 Electronic  Toss 74
46 Automatic  Brightness Control For Seven - Segment  Digita  Display 75
47 High Power Flasher 79
48 Programmable  Monoshot 79
49 Blown  Fuse Indicator 92
50 Burglar Alarm 92
51 Head Phone Amplifer 93
52 Latch Circuit Simplified 93
53 Two - Way  Remote  Call Bell 95
54 Bird Sound Generator With Timer 109
55 Cost Effective 4 - line To 16  - Line Decoder 110
56 Digital  Combination   Lock 110
57 Quad IC Tape Preamp 129
58 5 V To  25 V DC  Cnverter 129
59 Blown  Fuse Indicator Cum Capacitor tester 130
60 CMOS  Touch Switch 130
61 Auto Shut - Off For Tape Desks 131
62 Clap Switch Cum Touch  Switch With Timer 131