Electronic Project Volume - 08

Section A : Construction Projects
S.No
 Products
Page No.
01 Presettable 19 - Minute Digital Timer 11
02 Make Yourself This Quiz Display 14
03 Digital AC /DC Voltage Cum Continuity Tester 19
04 Digital Bank Token Number Display 22
05 RAM  Tester 30
06 Yoka Fun Box 33
07 Learn Robotics 36
08 Universal Logic Probe 44
09 Microprocessor Based Electronic Lock 48
10 Wind Direction Indicator 52
11 The  VU2ATN  QRP Transceiver 55
12 Graphic Display Board 61
13 Lead  Acid Battery Charger 70
14 High Gain 4 - Stage  T V  Booster 72
15 Digisplay  Profile 76
16 Trasistor And Diode Tester Cum Signal Injector 80

SECTION - B   CIRCUIT    IDEAS
1 8 - Digit  Microprocessor  display 95
2 Signal  Generator 96
3 Battery Level Indicator 96
4 4 - Line To 12 - Line  Decorder 96
5 Touch  Operated Bandswitch 97
6 Simplest Lamp Flasher Using Flickering LED 97
7 "Auto Alarm Off " For Digital Clock   98
8 Electronic Guard 99
9 Simple Transistor  Tester 99
10 Two - Way  Two - Station Calling System 100
11 Multi - Mode Intercom 100
12 Extra Door - Bell For Mains Failure 101
13 Timer With Audio  Alarm 101
14 Single Phase Preventer With Under / Over Voltage Cutout 102
15 Stereo  Tape  Preamp 103
16 ROM   Reader 103
17 Digitally  Adjustable Timer 105
18 Three Phase Automatic  Chargeover 106
19 Electronic 'X ' And 'O 'Game 106
20 Electronics  Pendulum 107
21 Microphone  Amplifier 108
22 Automobile Indicator With Auto Shut - Off 109
23 Combied Inverter ,Changer And Eliminator 109
24 Automatic Cycle Light 109
25 Capacitance Meter 110
26 Digital Tape Counter 110
27 Improved Auto - Cut ' Circuit For Manual Voltage Regulators 112
28 Low Cost Night Lamp 112
29 Automatic Overhead Tank Controller 112
30 Automatic Rain Detector 113
31 Class Room Addressing  System 113
32 3 -  Hour Delay Timer 114
33 Low Cost Touch Switch 115
34 Zener Tester 115
35 In - Circuit Transistor  Tester 115
36 Electonic Lock For  Cars 116
37 Efficient Use Of Memory 117
38 Heat Effected Buzzer 118
39 Preprogrammed Priority  Display 118
40 Touch SenSitive  Alarm 119
41 Burglar Alarm With Automatic Camera Control And Digital  Watch 120
42 10-Watt Power Amplifier 120
43 Reverse Polarity Protector 121
44 Audible Capacitance Meter 121
45 Two In One Electronic Games 122
46 Two In One Electronic Games 123
47 Accident Free Electro - Locomotive 123
48 Fridge Protector 124
49 Audio Annunciator For Automobile  Flasher 124
50 Head Phone Amplifier 125
51 Automatic Control  Of Radio 125
52 Improved  Delay Switch For Door Bell 126
53 Simple Low Cost Timer 126
54 (Half) Hour Beeper For Digital Clocks       127
55 Electronic Thermometer Cum Intensity Meter 127
56 Doubling  Audio Cassettes Recording Time 128
57 Self Resetting Fuse Alarm 130
58 Chirping  Cricket 131
59 Musical Burglar Alarm 131
60 De - Thump Circuit 131
61 Temperature Controller For Ovens 132
62 Electronic Running  Light 133
63 Touch Control Musical Bell 133
64 Selected Tune Musical  Doorbell 134
65 Touch Controlled  Amplifier 134