Sound Controlled Activated Triggered LED

When the microphone detects a loud sound, this circuit will turn the LED on. The “charge-pump” section consists of the 100n, 10k, signal diode and 10 uF electrolytic.   Here is the schematic diagram of the circuit: The charge pump section has two functions: rectifying and multiplying  the signal voltage. To illuminate the LED, a signal on the collector of the […]

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