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
- Power-On LED indicator