Sound Activated Lamp | Electronic Schematic Diagram https://electronicscheme.net Schematic Diagram & PCB Design Mon, 17 Nov 2014 02:19:42 +0000 en-US hourly 1 https://i0.wp.com/electronicscheme.net/wp-content/uploads/2017/05/cropped-transparent_text_effect.png?fit=32%2C32&ssl=1 Sound Activated Lamp | Electronic Schematic Diagram https://electronicscheme.net 32 32 129969089 Sound Activated Light / Lamp https://electronicscheme.net/sound-activated-light/?utm_source=rss&utm_medium=rss&utm_campaign=sound-activated-light https://electronicscheme.net/sound-activated-light/#respond Mon, 08 Aug 2011 04:49:22 +0000 http://electronicscheme.net/?p=1284 This is the schematic diagram of sound activated light or lamp. The lamp or light will be turned on while a loudy sound catch by […]

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This is the schematic diagram of sound activated light or lamp. The lamp or light will be turned on while a loudy sound catch by the microphone (for example: hand clap)

How this sound activated light works:
The condenser microphone fitted inside a position to catch the sound and generates AC signals, which pass by means of DC blocking capacitor C1 for the base of transistor BC549 (T1). Transistor T1 as well as transistor T2 amplifies the sound signals and delivers current pulses within the collector of T2. When audio is generated in front from the condenser mic, Triac1 (BT136) fires, activates the light plus the bulb (B1) glows for about two minutes.

Circuit Notes:

  • The TRIAC handles high voltage power source, separate it adequate spacing with the other components.
  • You may use common 12V DC power supply to operate this sound activated light circuit.

Warning: This is High Voltage Circuit, build this circuit carefully..!

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