Simple Mic Pre-Amp based LM358 circuit diagram


Here the simple audio mic pre amplifier circuit based on single IC LM358. The circuit is very simple, inexpensive and easy to built.
Simple mic pre amp based LM358

Component Parts List:
R1, R3, R4 = 10K
R2 = 1K
R5 = 100K-1M Potensiometer
C1 = 0.1uF
C2 = 4.7uF/16V
IC1 = LM358 dual op-amp single supply
Mic = Electret Microphone

Notes:

Use R5 to adjust the gain of op-amp LM358. The LM358 has dual op-amp module, you may build stereo audio pre-amp using single LM358.

Download LM358 datasheet here

The circuit designed by Tony van Roon


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