Free Electronics Projects
1. 1.5 Volt LED Flashers
2. 33-Volt Tunning Voltage
3. 9 Volt 2 Amp Power Supply
4. AC Line powered LEDs
5. Audio Booster
6. Automatic Dual output Display
7. Automatic Emergency Torch
8. Automatic Room Power Control
9. Automatic temperature controller
10. Bass -Treble Tone Control
11. Battery tester
12. Capacitance Bridge
13. CD-ROM Drive as Digital-audio CD-Player
14. Clap Switch
15. Condenser mic audio amplifier
16. Contactless AC Mains Voltage Detector
17. Dark Activated Switch
18. Darkness Controlled Light switch
19. DC MOTOR CONTROL USING A SINGLE SWITCH
20. Decibel Meter
21. Digital Switching System
22. Electronic Stethoscope
23. Fan Controller
24. Flashing-cum-Running Light
25. FM Beacon Broadcast Transmitter (88-108 MHz)
26. Four-in-one burglar alarm
27. FRIENDLY CHARGER FOR MOBILE PHONES
28. Frost Alarm
29. Game Show Timer
30. Generating -5 Volts From a 9 Volt Battery
31. High and Low Voltage Cutout with Delay and Melody
32. High Current Voltage Regulator
33. Infra Red Switch
34. Infrared Cordless Headphone
35. INFRARED TOY CAR MOTOR CONTROLLER
36. Intruder Radio Alert system
37. LED 12 Volt Lead Acid Battery Meter
38. LED Chaser
39. Low Cost Automatic Gate Light With A Musical Bell
40. Multi-Melody Generator with Instrumental Effect
41. Smart Cellphone Holder
42. Smart Foot Switch
43. Telephone Amplifier
44. Three-Color Display using Bicolor LEDs
45. UltraSonic Switch