This project is a 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
Gain Approx. 100
- On-Board electret condenser
- Header connector for connecting
of power supply input and audio output
Power-On LED indicator
- Four mounting holes of
3.2 mm each
- PCB dimensions 35 mm x 40 mm