Joe and Paul
Thanks for the help again fellas. Really like the PIC based link.
I will to modify this idea as my starting ponit and go from there.
Any idea if a microcontoller is used in the expensive profressional
detectors? Seems to me there have to be some form a programmable
device to block the iron and trash metals.

I think I have enough information now to be dangerous. This is going
to a fun project. Can't wait to let the smoke out of some electrical
components.


Thanks agian guys
Gordon

If at first you don't succeed, let the smoke out of another PIC.