Electronic Project Volume - 18

Section A : Construction Projects
S.No
 Products
Page No.
01 Capture Analogue Signals on Your PC Using Printer Port 03
02 Automatic Voltage Stabiliser Using Auto-Transformer 09
03 Digital  Code Lock 12
04 Manual EPROM Programmer Cum Verifier 16
05 20-Metre CW/SSB Receiver-I 20
06 PC Based Function Generator 23
07 Microprocessor-LCD Module Interface 27
08 20-Metre CW/SSB Receiver-II 33
09 Moving Message Display Using 8085 Microprocessor 39
10 Solidstate Synchroniser 47
11 Set-top Converter 51
12 Electronics Housie Player 60
13 DTMF Remote Monitoring System 64
14 Digitally Controlled Variable Power Supply 72
15 Multichannel Monitoring System 76
16 Telephone Call Master 82
17 IBM PC Compatible Timer Input-Output Card 86
18 Power Supply With Logic and Battery Backup 91
19 Versatile Digital Frequency Counter Cum Clock 95
20 Bank Token Number CMOS Display 102
21 Simple Relay and Sensor Interface  For PC 106
22 Emergency Light Using Compact Fluorescent Lamp 110
23 Infrared Remote Control 114
24 Arithmetic Logic Unit Demonstration Board 118

SECTION - B   CIRCUIT    IDEAS
1 Automatic Temperature Controlled Fan 125
2 Electronc Room Thermometer 126
3 Simple Neon Flasher 126
4 Wide Range Square Wave Generator 127
5 Infrared Proximity Sensor 127
6 Parallel Telephone with Auto Secrecy 128
7 FET and MOSFET Tester 129
8 Infrared Intruder Alarm 130
9 Programmable Switching System 130
10 Simple Water Level Indicator 131
11 Programmable Timer 132
12 Mains Operated Long Interval Timer 133
13 Inexpensive Single-Chip VCO 134
14 Mini Hi-Fi Stereo FM Transmitter 135
15 Stereo Tape Recording Unit 135
16 Inexpensive LCD Checker 137
17 Resistance-Capacitance Frequency Meter 138
18 Generating Sine Waves from Square Waves 139
19 Audio-Visual Tester cum Signal Injector 141
20 Logic Hi-Lo Indicator 141
21 On- Line Telephone Amplifier 142
22 1HZ Clock Indicator 142
23 Electronic Number Lock 143
24 Inexpensive Capacitance Meter 143
25 Sensitive Relay Driver 144
26 Musical Hold-on for Telephone 145
27 Programmable Timer 146
28 Expandable Sequential Switching Circuit 146
29 Week Long Timer for Digital Clocks 148
30 A Novel Touch Sensitive Toggle Swich 149
31 Caretaker for your Maintenance-Free Battery 150
32 Remote Musical Bell 153
33 Audio Signal Injector and Tracer 153
34 Preamplifier for Magnetic Phono Cartridge 154
35 Automatic Temperature Controlled Digital Fan Regulator 154
36 Tremolo Unit for Electric Guitar 156
37 Generating Three Tones from a Digital IC 156
38 Your Own CD Player 157
39 Simple Telephone Tester 158
40 Generating Nagative Supply from Positive Supply 158
41 Low Cost Audio Light Modulator 159
42 Single IC Based Optical Toggle Switch 160
43 A Low Distortion Audio Preamplifier 160
44 VHF Audio Video Transmotter 161
45 Double Output Current from Dual Op-Amp 162
46 Fullwave Phase Controller 163
47 Digital Volume Control 163
48 Fancy Christmas Lights 165
49 A Battery Operated Electronic Load 166
50 Simple IF Signal Generator 166
51 One Pulse Per Minute Generator 167
52 PC Based Digital Clock 167
53 Powerful AM Radio Transmitter 169
54 Low-Cost Electronic Lock 170
55 Programmable 8-Digit Code Lock 171
56 Preamplifier for FM Band 172
57 Sound Controlled Flip-Flop 172
58 Add Auto-Start to Generators 173
59 Tacho for Microprocessor Based Drives 174
60 Off-Line Telephone Tester 176
61 Ultrasonic Swich 177
62 Adjustable Dancing Lights 178
63 Versatile Variable Duration Digital Timer 179
64 Solidstate  Relay with Under/Over Voltage Protection 180
65 Hi-Fi Intercom 182
66 Programmable Musical Bell 183
67 Divide by 'N' Counter Usinig IC 4033 184