Electret Mic

[crivoli]

I am trying to build the following circuit:

http://www.uoguelph.ca/~antoon/circ/amp2.htm


I purchased the electret microphone at Radio Shack:

http://www.radioshack.com/product/in...entPage=search


This mic has 3 leads; Red, White and Ground.

How do I hook up the 3 leads on this circuit since it only shows two connections to the mic?

Thanks
-new user

 

[audioguru2]

Hi Crivoli,
Welcome to our forum. ;D

Did you get this microphone? RadioShack never show how to connect their stuff.
I think it has a red wire for a filtered positive voltage of 4V to 10V, a ground and a white wire output that connects to a coupling capacitor.

View attachment 38992

 

[crivoli]

The specs of the mic say that Red is V+, White is Output and Black is Ground...

Will this work with the schematic since it only shows two hook ups to the mic?

 

[steven2]

looks like ya biuldinga listening circuit like i did with audio gurus help. i had no luck with that 1458 circuit ya biulding but i did with the 741 alone  you can see them all in the forums under big ear  or super snooper circuit help reqest, somewhere

 

[audioguru2]

You can try connecting the 3-wire microphone like this:

View attachment 38993

 

[allvol]

Audioguru's circuit will work just fine.