Tiny Mic Pre-Amplifier

The Tiny Mic Pre-Amplifier project is based on a single transistor.  It amplifies the output of the electret condenser microphone. The project amplify low level signal coming from microphone and then provide sufficient voltage level to drive power audio amplifier. Good choice for Karaoke. Power supply : 5 ~ 9 VDC @ 2 mA PCB dimensions 26 mm x 56

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Microphone Pre-Amplifier Based on LM358

This is easy to construct microphone pre-amplifier project using compact electret condenser microphone. The pre-amplifier is important building block of many audio communication systems. Circuit has been built around Op-Amp LM358. Power supply : 5 to 12 VDC @ 10 mA Output: Gain Approx. 100 On-Board electret condenser microphone Header connector for connecting of power supply input and audio output

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