microphone computer circuit schematic


Posted on Feb 5, 2014

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 using this circuit. He has made a composite amplifier using two transistor


microphone computer circuit schematic
Click here to download the full size of the above Circuit.

s. Transistor BC413B operates in common emitter to give a slight boost to the mic signal. This is followed by an emitter follower stage using transistor 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

Undervoltage Detector
3V to 40 Volt DC Converter Circuit Schematic Diagram
integrated circuit Improving absolute precision of ADC to balance battery voltage
Electronics Thermometer with description
Low Power LED Battery Voltmeter
Revised version of LM35 based digital temperature meter
Remote Control Your Computer
Digital-Circuits
time delay relay circuit
Electronic safety-lock with telecars as key
Bridge the digital pressure signal conditioner MAX1458 excitation circuit diagram



Top