Dynamic microphone Amplifier for earphones


Dynamic microphone Amplifier for earphones

I decided to make this circuit so that I could listen to faint noises. It is a simple two-stage transistor amplifier design. The circuit was designed to use the input from a dynamic microphone but I am sure that with some modifications it would be possible to use an electret microphone. The 2N3053 transistors used in the design don’t have a particularly high gain so other types could probably be used as long as they are NPN.

Source: http://www.geocities.com/electronics3456/soundamp.html Thank you.


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