Computer Microphone Circuit


Posted on Feb 6, 2014

This circuit was submitted and design 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


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

ng this circuit. He has made a composite amplifier using two transistors. This is the figure of the circuit. This is the explanation about the principle work of the circuit. 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

VHF - UHF band reciever
Meter Tester
Window Comparator Circuit
555 Tone Generator Circuit (8 ohm speaker)
6 channel audio mixer
Talking Nixie Alarm Clock
Simple Morning Alarm Circuit Using LDR and UM66
PTT Schematic
Street light control circuit
Dual edge triggered circuit diagram
Analog PWM connection with FIG zps-101 interface
5W Valve RF Transmitter circuit



Top