Latest Blog Posts for electronic,circuits,diagrams,Projects-Design,electronics,hobby,kits,tutorials,schematics

• Puff to OFF LED Circuit Schematic With Explanation
  on Mar 31, 2012 in Fun Circuits
  This is a simple circuit in which the glowing LED can be switched OFF just by a puff. A condenser mic (M1) is used to sense your puff. When the push button S1 is pressed, the transistors Q2 and Q3 wired as latching pair gets activated and drives...
• Contactless telephone ringer Circuit Schematic With Explanation
  on Mar 30, 2012 in Fun Circuits
  The contact less telephone ringer circuit can produce a ring as well as a visual indication when a call comes.The main advantage is that since there is no direct contact between the phone line and the circuit there is no chance for a loading or d...
• Mobile incoming call indicator Circuit Schematic With Explanation
  on Mar 29, 2012 in Fun Circuits
  Mobile incoming call indicator Circuit Schematic With Explanation This circuit can be used to escape from the nuissance of obile phone rings when you are at home.This circuit will give a visual indication if placed near a mobile phone even if th...
• Infrared motion detector Circuit Schematic With Explanation
  on Mar 28, 2012 in Fun Circuits
  Here is the circuit diagram of an infrared motion detector that can be used to sense intrusions.Infra red rays reflected from a static object will be in one phase, and the rays reflected from a moving object will be in another phase.The circuit...
• Simple Lamp Dimmer/ Fan Regulator Circuit Schematic With Explanation
  on Mar 27, 2012 in Fun Circuits
  This is the circuit diagram of the simplest lamp dimmer or fan regulator.The circuit is based on the principle of power control using a Triac. BT 136Triac Necessary Data. The circuit works by varying the firing angle of the Triac . Resistors R...
• Remote controlled appliance switch Circuit Schematic With Explanation
  on Mar 26, 2012 in Fun Circuits
  Here is a versatile remote controlled appliance switch that can ON or OFF any appliance connected to it using a TV remote.IR remote sensor IC TSOP 1738 is used for receiving the signal. Normally when no signal is falling on IC3 the output of it will...
• NE-555 based Touch Switch Circuit Schematic With Explanation
  on Mar 24, 2012 in Fun Circuits
  This is the circuit diagram of a small touch plate controller using IC NE 555 .This circuit is ideally useful for making touch operated doorbells, buzzers,toys etc which when touched on the touch plate operates the relay for a preset time and the...
• Organ circuit schematic with explanation
  on Mar 23, 2012 in Fun Circuits
  Here is the circuit diagram of a simple yet interesting mini organ based on UJT 2N 4891( Q1). The circuit is based on a UJT oscillator who’s frequency is determined by the Presets R6 to R13(one at a time) and capacitor C2.The transistor Q2 dri...
• Scoring game circuit schematic with explanation
  on Mar 22, 2012 in Fun Circuits
  A simple scoring game circuit that can be used for all occasions when a dice is needed.The circuit is based on a NE555 timer,a 74LS192 counter,a74LS247 decoder and a & segment LED display.The timer IC1 will produce the clock for the counter I...
• Sound operated flip flop circuit schematic with explanation
  on Mar 21, 2012 in Fun Circuits
  This is a circuit which the status of the output pins of a Flip Flop IC can be toggled by using sound. A condenser microphone is used for picking up the sound.The first two opamps in the IC1 LM 324 is used to amplify the sound picked by the cond...

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