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MIC PRE-AMPLIFIER

This project is a microphone pre-amplifier based onΒ LM358.

DESCRIPTION

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
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 35 mm x 40 mm

SCHEMATIC

PARTS LIST

 

PCB


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