Microphone pre-amp

Posted on Sep 1, 2012

This circuit is used to give out a microphone preamp to a amplifier which will power the signal. The NPN transistors used are ECG123A. This circuit is also a older model to the one that now use IC's, but dont worry this will still work fine.

Microphone pre-amp
Click here to download the full size of the above Circuit.

It's output is as clean as a whistle. Remember the output cannot drive a speaker because is a preamplifier and only an amplifier can give an output for speaker. Any microphone can be used here. If you want you can put a LED light at the 12Volt input, but don't forget to put a 470k resistor in seties.

Leave Comment

characters left:

New Circuits



Popular Circuits

Car Battery Tester For Cranking Amps Circuit
puff to off circuit
Water Tank Controller Circuit PCB
Lamp flasher circuit
Weekend Projects with Bre Pettis Joule Thief
Simplified magnetic amplifier circuitry
The basic structure of the DA conversion circuit multiplexer
Energy-saving lamp circuit