MINI MICROPHONE PRE-AMPLIFIER USING 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
  •  Power-On LED indicator

 

 

 

 

 

 

Leave a Reply

Your email address will not be published.