This project is a sound activated switch.
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.
- 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,
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