Electronic Project Volume - 19

Section A : Construction Projects
S.No
 Products
Page No.
01 Computer Interfaced Voltage Transducer 03
02 A Versatile Digital Thermometer 07
03 Microprocessor Based Stepper Motor Axis Control 11
04 Precision Digital Stop-Watch 17
05 Automatic Lead-Acid Battery Charger 20
06 Interface Your PC with Lights and Fans 24
07 Digital Dial Clock 28
08 Development System Board for 8051/8031 32
09 Remote Controlled Switch Board 45
10 Digital IC Tester 51
11 4x2 Printer Sharer 63
12 Electronic Telephone Demonstrator 72
13 Multiple Control Remote Switch 79
14 A Digital Speech Security System 83
15 Current Mode Controlled Switching  Power Supplies 89
16 Fast Ni-Cd Battery Charger for 'Walkman' Batteries 95
17 Telephone Controlled Remote Switch 100
18 PH Measurements for Electronics Engineers 104
19 PC Based 4-Axis Stepper Motor Control 108
20 Digitally Controlled Function Generator 116
21 500-Watt Mosfet Based PWM Inverter 122
22 Programmable Digital Timer-Cum Clock 133

SECTION - B   CIRCUIT    IDEAS
1 Running Lights Effect 139
2 Four-in-One Burglar Alarm 140
3 Water Level Controller Using 3-Phase Starter 141
4 Digital Speedmeter 143
5 Telephone Call Counter 145
6 Telephone Amplifier 146
7 Ready-to-Use Object Counter 147
8 TV Channal selection Using Remote Control 148
9 LED Voltmeter for Car Battery 150
10 Automatic Temperature Controller 151
11 Simple Logic People 152
12 Automatic Switch for Audio Power Amplifier 153
13 A Highly Efficient DC Lamp Dimmer 154
14 Low Cost Automatic Gate Light with a Musical Bell 155
15 Capacitance Bridge 156
16 Darkness Controlled Light Switch 157
17 AF/RF Signal Tracer 158
18 Extension Phone Switcher 158
19 Quality FM Transmitter 159
20 Handy Telephone Receiver 160
21 Digital Volume Control 161
22 Battery Operated High Voltage Source 163
23 Programmable Priority Time Switch 164
24 Divide-by-N Counter Realisation Using 166
25 Simple Low Cost Disco Lights 167
26 Low-Cost Transisitorised Inverter 168
27 Hourly Chime Function Generator 168
28 Soft Musical Telephone Ringer 169
29 Automatic Telephone Answering Unit 170
30 Electronic Code Lock 171
31 Flashing Brakelight 172
32 Applince Timer 173
33 IR Remote Control 174
34 33 Volt Tuning Voltage 175
35 Car Anti-Theft Wireless Alarm 176
36 Ramp Controlled Light 177
37 Automatic Emergency Torch 177
38 Short Wave AM Transmitter 178
39 Simple Intercom Circuit 179
40 Fire Alarm 180
41 Tank Overflow Preventer 181
42 UPS for Cordless Telephones 182
43 Programmable LED Indicator 183
44 Economical Pump Controller 183
45 Watch-Dog for Telephones 184
46 Touch-Sensitive Musical Bell with Timer 185
47 Single-IC Decoy Switch 186
48 Magic Lights 187
49 Digital Dice with Numeric Display 188
50 Sensitive Temperature Switch 189
51 Automatic Temperature Controlled Fan 189
52 Computerised  Morse Code Gemerator/Transmitter 190
53 Programmable Door-Bell with Flashing LEDs 192
54 Designing Transistor Biasing Citcuits Using QBASIC 193
55 Clap Switch 194
56 Accurate Electronic Stop-Watch 195
57 Fluid Level Detector 196
58 Solidstate Auto Power-Off on Mains Failure 196
59 Infrared Electronic Shooting Game 197
60 7MHz CW/AM QRP Transmitter 198
61 Intelligent Switch 199
62 Up/Down Pulse Seperator 200
63 Metal Detector 201
64 Soft-Touch Bi-Directional Motor Driver 202
65 Radio Controlled Remote Control 203
66 Variable Frequency Ultrasonic Pest Repeller 205
67 Phase Failure Relay 206
68 Christmas Star 207