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).
Low Impedance Microphone Amplifier 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 |
PCB layout (bottom):
PCB layout (top-component placement):
Good luck with this low impedance microphone amplifier circuit project 🙂
Guitar Synthesizer Schematic Diagram In this post, we provide a collection of schematic diagrams of…
Handy Talky Schematic Diagram This is an old electronic scheme of the Handy Talky (HT)…
This is an old or "very old" schematic diagram of birdie tone or sound generator.…
Here is the 200W MOSFET amplifier powered based on four piece of IRFP250N, they are…
This is the 300W RMS stereo power amplifier circuit project. This amplifier is based four…
This is an active stereo tone control circuit using very well known op-amp IC of…