Circuits & schematics

Electronics guide

1. UltraSonic Radar - 23011

2. 500W low cost 12V to 220V inverter - 9883

3. One Transistor FM Radio - 9084

4. 10 Band Audio Equalizer - 8820

5. Servo Motor Control with PIC16F84 - 7790

6. Video/Audio Wireless Transmitter - 7716

7. 200W audio amplifier - 6491

8. 100W Guitar Amplifier - 6423

9. 100W Audio Amplifier - 6345

10. 5 band graphic equalizer using a single IC/chip - 6322

11. Line Robot - 5908

12. Led display digital Voltmeter - 4630

13. Baxendall Tone Control - 4582

14. 1.5W Audio power amplifier (12V) - 4447

15. VHF Audio Video Transmitter - 4384

16. 5-motor walker circuit - 4287

17. 15W Fm-transmitter - 4110

18. 13.8V 20A power supply - 4069

19. Ultrasonic Parking Sonar - 4017

20. Capacitor Discharge Ignition Circuit (CDI) - 3950

21. Simple Op-Amp Radio - 3948

22. Two transistor audio amplifier circuit - 3887

23. 3W FM Transmitter - 3754

24. Bass-treble tone control circuit - 3751

25. Walker Robot - 3674

26. Bass-treble tone control circuit - 3638

27. 90S2313 AVR Robot Board - 3570

28. Decibel Meter - 3567

29. Infrared beam barrier/ proximity sensor - 3535

30. 1 Watt C-Class RF Amplifier - 3532

31. Constant Current Battery Charger - 3496

32. Stereo Preamplifier with Bass-boost - 3482

33. Simple variable frequency oscillator - 3473

34. 60W Bass Amplifier - 3413

35. 4 Watt FM Transmitter - 3377

36. 100W RMS Amplifier - 3353

37. Digital Volume Control - 3269

38. LED Photo Sensor - 3256

39. Audio / video switch - 3217

40. Dome light dimmer for Cars - 3191

41. Video to RF Modulator - 3122

42. Automatic Room Lights - 3075

43. MPF102 FM Receiver - 3062

44. Remote control using telephone - 3044

45. 10W Mini Audio Amplifier - 2997

46. 60W Guitar Amplifier - 2983

47. Variable 3 - 24 Volt / 3 Amp Power Supply - 2971

48. Guitar Amplifier - 2947

49. 50 Watt Amplifier - 2911

50. CB receiver - 2869

51. RF Modem Robotics Project - 2864

52. 25W Mosfet audio amplifier - 2834

53. Coilless FM transmitter - 2829

54. Electret Microphone Pre-Amplifier - 2752

55. Control electrical appliances using PC - 2747

56. Composite color video signal travels on twisted-pair cable - 2711

57. Stereo Tone Control - 2705

58. Amplifier 2x30W with STK465 - 2685

59. 12V Inverter - 2682

60. Simple FM Transmitter - 2681

61. AC Line Current Detector - 2668

62. Telephone operated remote control using PIC16F84A microcontroller - 2617

63. The Video / Audio Distribution Amplifier - 2563

64. FM radio - 2558

65. Ultrasonic pest repellent - 2554

66. Charge Monitor for 12V lead acid battery - 2508

67. Basic UPS Power Supply - 2491

68. 12V Lead-Acid Battery Monitor - 2486

69. Car Battery Charger - 2483

70. 20dB VHF Amplifier - 2444

71. PWM Motor/Light Controller - 2442

72. Water Level Indicator with alarm - 2434

73. 4W FM Transmitter - 2428

74. FM transmitter - 2413

75. Power-Off Time Delay Relay - 2395

76. TRIAC Light Dimmer - 2386

77. Touch Activated Light - 2380

78. Zener Diode Tester - 2371

79. Digital Volume Control - 2359

80. 1W Bass Power Amplifier - 2316

81. Car anti theft wireless alarm - 2315

82. Digital Volume Control - 2314

83. IR Detector for Robotics - 2312

84. Dancing LEDs - 2305

85. Radio Remote Control using DTMF - 2286

86. Parallel Port Relay Interface - 2264

87. Improved 3 Transistor Audio Amp (80 milliwatt) - 2261

88. MK414 SW Receiver - 2249

89. Band 2 Preamplifier - 2175

90. Isolation between antenna network and TV/radio equipment - 2164

91. Remote control using VHF modules - 2163

92. 3 Transistor Audio Amp (50 milliwatt) - 2140

93. 0-30 vdc stabilized power supply with current control 0.002-3 a - 2134

94. Rain Alarm - 2123

95. 2 Transistor FM Voice Transmitter - 2113

96. Voice activated switch - 2110

97. 10W Audio Power Amplifier - 2095

98. A small FM transmitter (SMD) - 2092

99. TV remote control Blocker - 2092

100. Portable Microphone Preamplifier - 2069