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  1. Heat Sensor
  2. Temperature Sensor
  3. LM2585 Step-Up Switching Regulator(12V to 24V@1A)
  4. 400VA AC Light Dimmer
  5. Dual Regulated Power Supply Unit
  6. 5V DC Regulated Power Supply with Short Circuit Protection
  7. Stabilized Power Supply ( 3-30 V/2.5 A )
  8. 5 Volt DC Power Supply
  9. 15 Volt DC Power Supply
  10. Mini UPS
  11. Color Detector Circuit
  12. Inverter Circuit ( 100 Watt )
  13. USB Power Booster for PC / Laptop
  14. 1 Watt Four Stage FM Transmitter
  15. Simple FM Receiver
  16. Flasher Circuit using 555 Timer
  17. Police Siren using NE555
  18. Voltage Doubler Circuit using NE555
  19. Remote Controlled Switch Circuit
  20. Sensitive Optical Burglar Alarm
  21. Fridge Door Alarm Circuit
  22. 1.5 V LED Driver Circuit
  23. Fire Alarm Circuit
  24. Alarm Control Keypad Circuit
  25. Light Alarm with Timer 555
  26. Switch Debouncing Circuit
  27. Sensitive Intruder Alarm Circuit
  28. Seven Segment Intruder Alarm Circuit
  29. Photo Switch Circuit using 555 Timer
  30. IR Infrared Detector Circuit
  31. Infrared (IR) Sensor / Detector Circuit
  32. Infrared Detector Circuit
  33. Sensitive Optical Burglar Alarm
  34. Light Detector Circuit
  35. Gas Leak Detector Circuit
  36. Motion Detector Circuit
  37. Simple Photoelectric Detector Circuit
  38. Metal Detector Circuit
  39. Simple FM Transmitter
  40. 1.5 V Battery Operated Rebroadcast FM Transmitter
  41. 100 m Simple FM Transmitter
  42. FM Receivers
  43. 27 MHz Receiver
  44. One Transmitter FM Receiver
  45. Pocket Receiver with ZN414 & LM386
  46. 120 MHz FM Receiver
  47. Walky-Talky
  48. RF Based Wireless Remote Control System
  49. FM Radio Receiver
  50. Digital to Analog Converter using Binary-Weighted Resistors ( R-2R )
  51. Analog to Digital Converter (A/D)
  52. Frequency to Voltage Converter
  53. Light to Frequency Converter
  54. Speaker to Microphone Converter
  55. Converting CD-ROM Drive to Audio CD Player
  56. Voltage Comparator Switch
  57. Dark Activated Switch
  58. DC Motor Reversing Circuit
  59. Sound Operated Switch
  60. Tone Booster Circuit
  61. 2*5 W Stereo Power Amplifier Circuit
  62. 6 Watt Hi Fi Audio Amplifier
  63. 60 Watt Amplifier Circuit
  64. Stereo Pre-Amplifier using LA3161
  65. 100W MOSFET Power Amplifier
  66. 100W Audio Amplifier using TDA7294
  67. Line Follower Robot using 8051
  68. Interfacing Hex Keypad to 8051
  69. Interfacing Dot Matrix LED Display to 8051
  70. Delay Using 8051 Timer
  71. Water Level Controller using 8051
  72. Voltmeter using 8051 Microcontroller
  73. Random Number Generator Using 8051
  74. Object Counter using 8051
  75. Automatic Water Tap (Faucet/Valve) Controller
  76. Mobile Incoming Call Indicator
  77. Power Failure Alarm
  78. PWM Lamp Dimmer
  79. Rain Alarm Circuit
  80. Obstacle Avoiding Robot
  81. Musical Bell Circuit
  82. Multipurpose Circuit for Telephones
  83. Protection For Your Electrical Appliances
  84. Designing An RF Probe
  85. Bass and Treble for Stereo System
  86. Smart Fluid Level Indicator
  87. Simple Code Lock
  88. Electronic Fuse Circuit
  89. Seven Segment Intruder Alarm Circuit
  90. Stereo Headphone Amplifier using LM4910
  91. Automatic Dark Sensor
  92. 500W 12V to 220V Inverter
  93. LED Chaser Circuit using CD4017 and NE555 Timer
  94. Clap Switch Circuit
  95. Melody generator using UM66
  96. Dark Sensor using Transistor, Phototransistor and Photodiode
  97. Low cost / Automatic Emergency Light
  98. Automatic Fan Controller
  99. Simple DC motor PWM speed control
  100. Sound Level Indicator
  101. On-Off Temperature Control
  102. LED VU Meter with LM3916
  103. Triac based lamp dimmer
  104. LED Chaser Circuit
  105. PicoBuck - RGB LED Driver
  106. NiCd - NiMH Charger
  107. A 4-Digit Keypad Controlled Alarm Circuit
  108. Laser Communication System
  109. LASER Link Communicator Circuit
  110. 20W Bridge Audio Amplifier
  111. 1 to 100 Seconds Timer
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