This is a simple audio mic pre amplifier circuit based on single IC LM358. The circuit is very simple, inexpensive and easy to built.
|Rangkaian Simple Preamp Mic using LM358|
- variable resistor of R5 to adjust the gain of op-amplifier IC LM358.
- The LM358 has two op-amp module, you may build stereo audio pre-amplifier using single LM358.
Component list of simple preamp mic circuit:
R1, R3, R4 : 10K R2 : 1K R5 : 100K-1M Potensiometer C1 : 0.1uF C2 : 4.7uF/16V IC1 : LM358 dual op-amplifier Mic : Electret Microphone