ok....how about making a window monitor....using two opamps, with a
digital pot controlled by the micro?

> ----------
> From:         Hisham Abboud[SMTP:abboud@CEDRUS.CEDRUS.COM]
> Sent:         Wednesday, September 24, 1997 11:36 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Help connecting a microphone to a PIC
>
> Hello,
>
> I have an application which requires that a PIC
> microcontroller monitor the volume level on a microphone.
> It doesn't need to record or anything, simply monitor
> the volume level and take some action based on whether
> the level is above or below a certain threshold.
> This cannot be done with a comparator since the threshold
> can be set at will by software inside the PIC.
>
> Are there any schematics available on how to connect
> a microphone to the A/D port of a PIC?  Do I need a
> pre-amp?  What else would I need?
>
> Thanks in advance.
>
>                 Hisham.
>
>
> --------------------------
> Hisham A. Abboud
> Cedrus Corporation.         On the Web: http://www.cedrus.com
>