Wow. that mystery was solved in a matter of minutes. Thanks for the assist, all of you. Chris~ Al Williams wrote: > > If it is really a carbon mic, you need to provide a voltage. It is just > a "sound-dependent resistor" so to speak. So try putting a voltage and a > resistor in series with it and measure the drop across the mic. -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu