Thursday, March 12, 2009

Low Impedance Microphone Amplifier

You can download the schematic, pcb layout and component list from here





Download this schematic diagram.



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

Component list:


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

No comments:

Post a Comment