## Low Impedance Microphone Amplifier Electronic Circuit Diagram

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On: 13 Jun, 2016

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This is the circuit diagram of low impedance microphone amplifier. The circuit designed for use with low impedance (~200 ohm) microphones. It will work with regulated voltages between 6-30VDC. If you don’t build the impedance adapter part wi...

This is the circuit diagram of low impedance microphone amplifier. The circuit designed for use with low impedance (~200 ohm) microphones. It will work with regulated voltages between 6-30VDC. If you don’t build the impedance adapter part with T1, you get a microphone amplifier circuit for higher impedance microphones. In this case, you should directly connect the input signal to C7 (bypass the TI transistor).

Parts
R1=15k
R2= 150k
R3= 2k2
R4= 820
R6= 10k
R7= 10k
P1= 1M
C1= 3k9
C2= 100u
C3= 22u
C4= 4u7
C5= 470u
C6= 10u
C7= 100n
C8= 47u UNIPOLAR
D1= 1N4148
U1= TL081
CN1= SIL6

R1=15k C1= 3k9 U1= TL081 R2= 150k C2= 100u D1= 1N4148 R3= 2k2 C3= 22u CN1= SIL6 R4= 820 C4= 4u7 R6= 10k C5= 470u R7= 10k C6= 10u P1= 1M C7= 100n C8= 47u UNIPOLAR

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