Electronic Project Volume - 15

Section A : Construction Projects
S.No
 Products
Page No.
01 A Versatile Receiver For Dxers 03
02 Gongs  And Alarm For CMOS LED Dial Clock 08
03 Hi - Fi Stereo Cassette Deck 12
04 Digital Chess Clock 20
05 Cordless Security System 24
06 Microprocessor - Based Capacitance And Resistance Measurment Meter 27
07 BFO For Receiving SSB Signals 30
08 Safety Indicators And Aids 33
09 A Single - Chip Timer With Digital Clock And Calendar 37
10 Portable SMD Soldering Station 44
11 Digital  Controller For Outdoor Lights 47
12 VOX For Ham Rigs 50
13 Steady  Hand Game 53
14 Teleconversation Limiter 56
15 Portable Number  Lock 59
16 Humiditty Controller 64
17 Doorbell Cum Security  Alarm 66
18 Improved Three - Phase Power supply Card 72
19 Solidstate  Advertisement Display 74
20 Auto - Changing In / Out Indicator With Doorbell 77
21 Telex - Computer Change Over  Switch 80
22 60W  Active Amplifier System 83
23 Impedance Meter 87
24 Interruption Counter Cum  Burglar Alarm 93

SECTION - B   CIRCUIT    IDEAS
1 Digital Even And Odd Parity Checker / Generator 101
2 SW  Booster For DXers 102
3 Intercom For Your Home 102
4 Slave Switch 103
5 Morse Interpluse Time Period Counter 104
6 Amplifier Taciturner 105
7 Remote Audio Level Indicator 106
8 Simple  Karaoke Circuit  106
9 Transistorised  'WalkMan'  Radio Player 107
10 Safety Circuit For Instant Water Heater 108
11 Long Duration Sequential  Timer With IC MM 5387 109
12 Telephone Silencer 111
13 Contol  Circuit For In / Out Counter 112
14 Low - Cost Pulse Generator 113
15 Top secret  Code Lock 114
16 Accurate  Frequency - To - Voltage Converter 115
17 Rolling  Electronic  Dice 116
18 Gradually Turing - Off  Courtesy Light 117
19 Digital  On  -  Off  Timer 118
20 Rain - Operated  Wiper 120
21 Programmable  100 - Day  Timer 120
22 Phase  Sequence Detector Cum  Single -  Phase  Protector 121
23 Multichannel  Touch  Switch 122
24 Two - In - One Switch Ciircuit 123
25 Stereo Audio Level  Indiicator 124
26 Keyboard With  Strobe Signal 125
27 Hybrid Audio Output Amplifier 126
28 Sawtooth Wave Generator 126
29 Maltichannel  Water Level  Monitor  - Cum -- Controller 127
30 Programmable 100 - Hour   Timer 128
31 -30 to + 30 V   Regulated  Power  supply 130
32 SCR / Triac Tester Cum Distinguisher 131
33 Thermometer Add - On To  Multimeter 132
34 Listening  Bug 133
35 Telephone  Tappnig  / Misuse  Indicator 133
36 Electronic Calling  System 134
37 Hen  Sound  Emulator 136
38 Phone Line Monitor 136
39 Improved  Pest  Repeller 137
40 Logic  Level Detector Cum  Continuity Tester 138
41 Flora  Caretaker 138
42 Electronic  Candle 139
43 Motor Protector  And  Water Level  Indicator  140
44 360 W Hi - Fi  Stereo  Power  Amplifier 140
45 Regulated  Power  Supply  With  Short -  Circuit  Protection 141
46 Musical  Greeting  Card  142
47 Temperacure  Controlled  Fan 143
48 Line Synchronised  Oscillator 145
49 Electronic  Fuse 145
50 Polarity  Tester 146
51 Low - Cost 4 - to 16 Line Decorder 147
52 Automatic  Volume  Control 148
53 Musical   Continuity Tester 148
54 Hi  - Q Stereo Mixter 149
55 1 Hz  Master Oscillator 150
56 Super  Simple  Timer 150
57 Stereo Disconnector With Timer 151
58 Frequency  Filter For Playing Old Recoords 152
59 Static  Starter 153
60 Headphone Adaptor  For Hi - Fi  Stereo Cassette  Player 153
61 Linear Bulb Light Controller 154
62 Elecronic Automobile Horn 155
63 Call Bell For The Impatient 156
64 0-10V Amplifier 156
65 A Sensitiv Touch Switch 157
66 Remote TV Tester 158
67 PH Meter 159
68 Cordless Intercom 159
69 A Simple Battery Charger 161
70 Tempreture Sesor for Power Amplifier 162
71 Telefone Amplifier 163
72 A Binary Frequency Meter 164
73 Caretaker For Home Appliances 165
74 40W + 40W Auo-Reverse Sttereo Cassette Player 167
75 Remote  TV  Headphones 168
76 Infrared Remote Contol  Tester 169
77 Soft Radio / Cassette Selector 170