Computer Microphone


Posted on Feb 6, 2014

This 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 using this cir


Computer Microphone
Click here to download the full size of the above Circuit.

cuit. 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

Siren
Distortion Analyser
Ultrasonic Pest Repeller schematic
Flash slave driver
One KHz Synchronous Detector Circuit
mc2833 fm transmitter circuit design electronic project
ADUC814 1.3MIPS 8052 MCU + 8kB Flash + 6-Ch 12-Bit ADC + Dual 12-Bit DAC
atmega 32a programming
Whites Classic I metal detector schematic diagram
A deaf visual doorbell circuit



Top