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CLAP SWITCH USING IC NE555

FIG. CLAP SWITCH USING 555
A condenser microphone is placed before Q1 and the collector of Q2 has to be connected to the terminal of
capacitor C2. Whenever there is loud sound produced near the condenser mic, pin 2 of 555 gets
triggered and it switches on the LED D1. We can adjust the sensitivity of the circuit using a
variable resistor in place of fixed resistor R5.

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