ELECTRET MICROPHONE

This is an easy to construct microphone pre-amplifier project using a compact electret condenser microphone. The pre-amplifier is the important building block of many audio communication systems. The 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
Shema OK
PCB OK
Test OK

Files:

  • PDF (Shema, PCB, Components placement)
  • Tiny CAD (Shema)
  • Sprint Layout (PCB, Components placement)

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