> The project is part of a sensor that will determine the state of a cavity by
> interrogating it with a sound wave (more I cannot say!)

Coffeemaker, eh?

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
"[PIC]:","[SX]:","[AVR]:" =uP ONLY! "[EE]:","[OT]:" =Other "[BUY]:","[AD]:" =Ads