Electret Microphone Preamplifier

Posted on Jul 26, 2012

This circuit will be useful if you have an electret microphone that produces a low audio (sound) level and you want to connect it to an amplifier or something like it. The circuit boosts the microphone output voltage to obtain an acceptable signal level. Just adjust the R5 potentiometer to obtain the desird gain. Note that the R5 value is dependent on your gain need.

Electret Microphone Preamplifier
Click here to download the full size of the above Circuit.

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