Sunday, March 15, 2015

Circuit Schematic MIC Pre-amplifier using LM358 IC

Robometricschool. - Here is simple electronic circuit schematic for MIC Pre-amplifier using LM358 IC like in figure 1 below. 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.

Circuit schematic
Figure 1. Circuit Schematic MIC Pre-amplifier using LM358 IC

Component List and Layout


For you who like with audio sound system, electronic schematic like in figure 1 above is one of the part of audio to amplify microphone input signal. The circuit schematic MIC Pre-amplifier using LM358 IC give you specification as follow :

- 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 

The original article : "MIC Pre-amplifier"


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