MIC PREAMP for PC speaker

[avz]

Hi all
I would like to connect a microphone to pc speakers that have a built in amplifier. to do that I need a preamp. can you recommend a simple circuit that will do?
Thanks.

 

[Torben]

Hi all
I would like to connect a microphone to pc speakers that have a built in amplifier. to do that I need a preamp. can you recommend a simple circuit that will do?
Thanks.

What kind of microphone?


Torben

 

[avz]

Mic preamp

The simple dinamyc that is used with the pc

 

[audioguru]

A pc usually uses an electret mic.
You need a switch to disconnect the mic when the speaker is playing and disconnect the speaker when the mic is used to avoid acoustical feedback howling.

 

[avz]

Mic preamp

Yes, but before that I need the preamp.

 

[audioguru]

Here is a preamp circuit for an electret mic:

 

[avz]

Thanks. I'll do it