Electric Mic with Gain control. #sound #audio #electrcal #electronics #diy

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Electret Microphone Audio Preamp with Adjustable Output

In this simple audio circuit, I connected an electret microphone using a 1µF ceramic capacitor for AC coupling and a 100Ω resistor to limit the signal. I’ve also added a 1k potentiometer after the capacitor to control the gain/output level manually. Power is supplied through a 1k resistor from a 3V–10V source. This setup filters out DC noise and lets you adjust the output signal easily, making it perfect for connecting to amplifiers or microcontrollers for audio input.