Electronic Project Volume - 25

Section A : Construction Projects
S.No
 Products
Page No.
1. Microcontroller Based Call Indicator 3
2. Automatic Water Level Controller 13
3. Digital Water Level Indicator Cum Pump Controller 17
4. PC Based Data Logger 23
5. Lift Overload Preventor 28
6. Sound Operated On/Off Switch 32
7. Digital Clock Using Discrete ICs 35
8. A Bidirectional Visitor Counter 39
9. Programmer For 89c51 / 89c52 / 89c2051 Microcontroller 43
10. Laser Based Communication Link 55
11. Device Switching Using Password 60
12. Remote Controlled Sophisticated Electronics Code Lock 64
13. Temperature Indicator Using 89c52 71
14. PIC 16F84 Based Coded Device Switching System 78
15. Load Protector With Remote Switching Facility 90
16. Voice Recording And Play Back Using APR9600 Chip 93
17. Dynamic Temp Indicator And Controller 98
18. Stepper Motor Controller Using 89c51 Microcontroller 105
19. Microcontroller Based Home Security System 109
20. Safety Guard For Blind 115
21. Digital Combination Lock 121
22. Ultrasonic Lamp Brightness Controller 124
23. Moving Message Over Dot Matrix Display 127

SECTION - B   CIRCUIT    IDEAS
1 Intruder Alarm 135
2 LED Based Message  Display 135
3 DC-To-DC Converter 137
4 Versatile Proximity Detector With Auto Reset 137
5 Window Charger 138
6 Multi Band CW Transmitter 139
7 Programmable Timer For Application 141
8 Antibag Snaching Alarm 142
9 Off Timer With Alarm 143
10 Over Voltage Protector 143
11 Fuse Cum Power Failure Indicator 144
12 LED Based Reading Lamp 145
13 Mobile Cell phone Charger 146
14 Smart Foot Switch 147
15 Doorbell Controlled Porch Light 148
16 AC Mains Voltage Indicator 148
17 Sound Operated Light 150
18 Low Cost Electronics Quiz Table 151
19 Zener Diode Tester 151
20 Highway Alert Signal Lamp 152
21 Variable Power Supply With Digital Control 153
22 Simple Security System 155
23 Low Resistance Continuity Tester  155
24 Child's Lamp 156
25 Clap Operated Electronics Switch 157
26 Light Controlled Digital Fan Regulator 158
27 Sensitive Optical Burglar Alarm 158
28 Watchman Watcher 160
29 Cell Phone Controlled Audio / Video Mute Switch 161
30 Panel Frequency Meter 162
31 Random Flashing X'mas Stars 163
32 PC based DC Motor Speed Controller 164
33 Frequency Divided Using 7490 Decade Counter 166
34 Dome Lamp Dimmer 166
35 Offset turning indicator for CW 167
36 8-Digit Code Lock For Appliance Switching 168
37 Stabilised Power Supply With Short Circuit Indication 169
38 Light Operated Internal Door Light 170
39 Mains Box Heat Monitor 171
40 Digital Stop Watch 172
41 Flashing Cum Running Light 173
42 Faulty Car Indicator Alarm 174
43 Quality FM Transmitter  
44 Simple Key Operated Gate Locking System  
45 DC Motor Control Using Single Switch  
46 Handy Tester  
47 Programmeble Electronics Dice  
48 PC Based Candle Ignitor  
49 Solid State Remote Control Switch  
50 Microcontroller Based Monitoring System  
51 Automatic School Bell  
52 Automatic Water Pump Controller  
53 Noise Meter  
54 Anti theft alarm For Bike  
55 Timer With Musical Alarm  
56 Mains Failure / Resumption Alarm  
57 Soldering Iron Temperature Controller  
58 Multipurpose White LED Light  
59 Electronic Watchdog  
60 Fire Alarm Using Thermistor  
61 Twilight Lamp Blinker  
62 Electronic Street Light Switch  
63 Water Level Controller  
64 Sound -Operated Intruder Alarm  
65 Hit Switch  
66 Chanting Player