Circuits & schematics

Electronics guide

1. UltraSonic Radar - 10707

2. 500W low cost 12V to 220V inverter - 7118

3. Servo Motor Control with PIC16F84 - 4230

4. One Transistor FM Radio - 4182

5. 200W audio amplifier - 3863

6. 100W Guitar Amplifier - 3589

7. 10 Band Audio Equalizer - 3584

8. Video/Audio Wireless Transmitter - 3472

9. 100W Audio Amplifier - 3430

10. Led display digital Voltmeter - 3172

11. Line Robot - 2954

12. VHF Audio Video Transmitter - 2817

13. 5 band graphic equalizer using a single IC/chip - 2797

14. 1.5W Audio power amplifier (12V) - 2691

15. 15W Fm-transmitter - 2625

16. 3W FM Transmitter - 2376

17. 13.8V 20A power supply - 2375

18. Constant Current Battery Charger - 2351

19. Ultrasonic Parking Sonar - 2307

20. Decibel Meter - 2155

21. Infrared beam barrier/ proximity sensor - 2097

22. 4 Watt FM Transmitter - 2096

23. LED Photo Sensor - 2054

24. Walker Robot - 2044

25. 100W RMS Amplifier - 2028

26. Bass-treble tone control circuit - 2028

27. 5-motor walker circuit - 1983

28. Audio / video switch - 1980

29. MPF102 FM Receiver - 1978

30. Baxendall Tone Control - 1977

31. Bass-treble tone control circuit - 1971

32. Capacitor Discharge Ignition Circuit (CDI) - 1910

33. Remote control using telephone - 1858

34. 90S2313 AVR Robot Board - 1849

35. Automatic Room Lights - 1849

36. Simple Op-Amp Radio - 1833

37. 50 Watt Amplifier - 1824

38. 60W Bass Amplifier - 1807

39. Control electrical appliances using PC - 1763

40. Digital Volume Control - 1758

41. Stereo Preamplifier with Bass-boost - 1687

42. Charge Monitor for 12V lead acid battery - 1674

43. 60W Guitar Amplifier - 1662

44. Telephone operated remote control using PIC16F84A microcontroller - 1651

45. Amplifier 2x30W with STK465 - 1638

46. FM radio - 1636

47. Coilless FM transmitter - 1630

48. Dome light dimmer for Cars - 1628

49. Guitar Amplifier - 1625

50. Variable 3 - 24 Volt / 3 Amp Power Supply - 1596

51. Power-Off Time Delay Relay - 1596

52. Stereo Tone Control - 1570

53. Simple FM Transmitter - 1538

54. 12V Lead-Acid Battery Monitor - 1538

55. 10W Mini Audio Amplifier - 1536

56. TRIAC Light Dimmer - 1526

57. 12V Inverter - 1523

58. RF Modem Robotics Project - 1516

59. Car Battery Charger - 1473

60. CB receiver - 1465

61. 20dB VHF Amplifier - 1450

62. 3-Axis Stepper Controller - 1448

63. Composite color video signal travels on twisted-pair cable - 1447

64. Touch Activated Light - 1422

65. The Video / Audio Distribution Amplifier - 1420

66. AC Line Current Detector - 1402

67. Digital Volume Control - 1387

68. Parallel Port Relay Interface - 1370

69. Digital Volume Control - 1368

70. Car anti theft wireless alarm - 1362

71. Headphone Amplifier - 1355

72. Video to RF Modulator - 1353

73. Remote control using VHF modules - 1326

74. 4W FM Transmitter - 1317

75. 7 Segment LED Counter - 1312

76. IR Detector for Robotics - 1311

77. Water Level Indicator with alarm - 1300

78. 1 Watt C-Class RF Amplifier - 1294

79. Two transistor audio amplifier circuit - 1282

80. Rain Alarm - 1278

81. FM transmitter - 1277

82. Basic UPS Power Supply - 1273

83. Ultrasonic switch - 1272

84. 0-30 vdc stabilized power supply with current control 0.002-3 a - 1267

85. 1W Bass Power Amplifier - 1266

86. Zener Diode Tester - 1259

87. Sawtooth wave generator - 1259

88. 25W Mosfet audio amplifier - 1248

89. Isolation between antenna network and TV/radio equipment - 1246

90. Dancing LEDs - 1236

91. DC to DC Converter - 1231

92. 2 Transistor FM Voice Transmitter - 1228

93. Ultrasonic pest repellent - 1226

94. 4 Transistor Transmitter - 1222

95. Simple but reliable car battery tester - 1218

96. Radio Remote Control using DTMF - 1216

97. Video Switch - 1215

98. Voice activated switch - 1207

99. Digital Voltmeter - 1198

100. Electronic Thermostat and Relay Circuit - 1194