Sound Activated Switch – Relay

  • Rajkumar Sharma
  • 54.645 Views
  • medium
  • Tested
  • SKU: EL36088
  • Quote Now

photo

This project is a sound activated switch.

Description

Clap switch/Sound-activated switch designed around op-amp, flip-flop and popular 555 IC. Switch avoids false triggering by using 2-clap sound. Clapping sound is received by a microphone, the microphone changes the sound wave to electrical wave which is further amplified by op-amp.

555 timer IC acts as mono-stable multi-vibrator then flip-flop changes the state of output relay on every two-clap sound. This can be used to turn ON/OFF lights and fans. Circuit activates upon two-clap sound and stays activated until another sound triggers the circuit.

Specifications:

  • Supply 12V DC @ 60mA
  • On board preset to set the sensitivity
  • On board LED to indicate the Relay on/off state
  • On board Microphone
  • Relay switch 5Amps, 110V-230V

Schematic

Sound_Activated_Switch_Top_schematic

Parts List

image description

PCB

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Casaol John Rex

did this project worked and tested ?

JRex

thanks. but why is it that the schematic and the list of materials doesn’t sum up? the IC part.

Adeel

all projects send me at my email

JRex

hey! thanks ! ^_^

angella benedict

hello, it has been a good schematic diagram and i tried and worked very well. thanks so interesting and lovely.

Andy Lee

Can I get these several products? I will pay for it.

Nlabla

Are y still wanting some electrical items made if so emakl me at needsumpeace1@gmail.com and let me know what u want and we can start makeing those up

deepak

I want to use through hole components instead. Of. Surface mount device . So what should I use instead of bc847? ? Plz help.

Electro tech

I’m interested in Electronic circuit design, but just a beginner. I need someone that can teach me programming of microcontrollers and Arduino

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