Electronic Project Volume - 23

Section A : Construction Projects
S.No
 Products
Page No.
1. Eprom Controlled Lighting Effect generator 3
2. A versatile Programmable Timer 6
3. Two Wire Remote Controlled Unit 9
4. Make Your Own Automobile Stereo 14
5. Simple Digital Clock with Hourly Music 19
6. Make Your own Eprom Eraser with Electronic Timer 22
7. Multipurpose Absorption Rate Meter for Fabrics 26
8. Digital Flow Meter 30
9. Z - 80 based Auto-ranging LCD Capacitance Meter 34
10. Voice Recording and Playback 44
11. PC Based Dial Clock with Timer 51
12. Electronic Century Calendar 57
13. Electronic Roulette Wheel 61
14. Number Guessing Game 65
15. Pic Burner : The Programmer for PIC16X8X Microcontroller 69
16. Imteractive Gal Programmer for Beginners 75
17. #95 Debarring Facility for your Telephone 82
18. Microcontroller Based Access Control System 86
19. Versatile Programmable Star Display 96
20. Multi Channel Access Control System 104
21. Microcontroller Based Annunciator System 109
22. Intelligent Emergency Light 115
23. Truth Table Evaluator and Karnaugh Map Plotter 120

SECTION - B   CIRCUIT    IDEAS
1 Parallel Telephones with Auto Secrecy And Intercom Facility 127
2 Hardware Solution for Two Simultaneous Linear Equations 129
3 Low Power Broadcast Transmitter 130
4 Laser Torch Based Voice Transmitter and Receiver 131
5 Mobile Phone Battery Charger 132
6 Digital Dice-cum-alpha Display Tosser 133
7 Shortwave Transmitter 134
8 Fan Speed Control by clapping 135
9 FM Booster 136
10 Hex-To-Analogue Converter 137
11 Three Phase Star Delta Motor Starter 138
12 Multi Tester with Audio-Visual Indication 139
13 IR Remote Switch 140
14 Ding Dong Bell 141
15 5.5 MHz/10.7 MHz IF-FM Signal Generator 142
16 Doctor's Switch 142
17 Remote Control Using AC Mains 143
18 High-Power Telephone Extra Ringer 145
19 Music-On-Hold For Telephones 145
20 Solid state Switch for DC Operated Gadgets 146
21 Infrared Car Parking Guard  147
22 FM Band Receiver 148
23 8085 Kit-Based Relay Control 149
24 Security Alarm For Motor Bikes 151
25 Mains-Operated Christmas Star 151
26 Single-Plate Touch Switch 152
27 Dual -speed Fan Driver for Heat-Sink 152
28 Crystal Controlled Time Base Generator 153
29 40-metre CW Transmitter 154
30 Temperature-Controlled Ni-Cd Battery Charger 154
31 Measuring Rigs and Add-ons For Radio Amateurs 156
32 Exclusive-OR Gate Applications 157
33 Wireless Stepper Motor Control 158
34 Contact less Ringer For Telephones 160
35 Mains Manager 160
36 LED-cum-diode Tester 161
37 Measurement of Transistor hFE 162
38 Infrared Toy Car Motor Controller 163
39 Low-cost Battery Charger with high-/low-voltage Cut-off 164
40 Electronic Guard for Blind 165
41 20M,4W QRP Transmitter 166
42 Priority Indicator For Quiz Contests 167
43 Infrared Remote Control Tester 168
44 Low-cost Cordless FM Microphone 169
45 AC Line Detector 169
46 Multi-pattern Running Lights 170
47 Home Appliance Protector 171
48 RMS-TO-DC Converter 172
49 Cell Phone Call Indicator 173
50 Keyhole Finder 173
51 Remote-Controlled Fan Regulator 174
52 Using Single Telephone on Two Telephone Lines 175
53 Digital Clock with Hour Alarm 176
54 Automated Traffic Signal Controller 177
55 Flashing Beacon 180
56 Knock Alarm 181
57 Crystal-Controlled VFO for 40m Amateur Radio 182
58 PC-Based Oscilloscope 182
59 Intruder Radio Alert System 185
60 Automatic Porch Light with Melody 187
61 Melody Generator 187