Microphone Circuit-PC Sound Card


Posted on Feb 4, 2014

This microphone circuit was submitted by Lazar Pancic from Yugoslavia. The sound card for a PC generally has a microphone input, speaker output and sometimes line inputs and outputs. The mic input is designed for dynamic microphones only in impedance range of 200 to 600 ohms. Lazar has adapted the sound card to use a common electret microphone usi


Microphone Circuit-PC Sound Card
Click here to download the full size of the above Circuit.

ng this circuit. He has made a composite amplifier using two transistors. The BC413B operates in common emitter to give a slight boost to the mic signal. This is followed by an emitter follower stage using the BC547C. This is necessary as the mic and circuit and battery will be some distance from the sound card, the low output impedance of the circuit and screened cable ensuring a clean signal with minimum noise pickup.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

12v to 5v converter
50 watt power MOSFET amplifier circuit diagram
SB Midi Cable
4 Channel Portable Audio Mixer
Electric Fence 20KV pulses for perimeter defense
Solid-Motion
Aikido octal mono PCBs and 5687 PCBs and Aikido and 300B amplifiers
Simple flower circuit
Electronic counter with automatic counting interface circuit a



Top