On Thu, 15 Jul 2004 05:43:11 GMT, mlf wrote:

In article , says...
My electret mic has only two wires. I saw a amplifier ciruict for a electret
which has 3 wires. the circuit consists of a LM741 opamp and a 2N2222
transistor. Can I use a two wire electret? what is the difference?



I am going to venture a guess that the body of the mic is ground.
In fact, I would make C1 an electrolytic 4.7uf and hook up this path:
+5 - red wire - -o- black/white wire - +4.7 - amp input.

---
I'm going to venture a guess that you're wrong:


+V
|
[3K]
+-----+ |
| BIAS|--+--[+10µF]---AUDIO OUT
| |
| GND|---------------GND
+-----+


--
John Fields