You could measure a change in capacitance which would be reflected in the
time it takes to charge or discharge to the point of the logic level change
being detected.


At 07:38 AM 11/25/97 -0800, you wrote:
>     Hi all,
>
>     Does anyone here happen to know a method to detect electrical contact
>     between two metal parts without having a ground return to complete the
>     circuit? I just want to see if anyone else has solved this problem
>     before.
>
>     The reason it is on this list is because I will use a PIC to detect
>     this contact.
>
>     Later,
>
>     Eric
>
>
Larry G. Nelson Sr.
mailto:L.Nelson@ieee.org
http://www.ultranet.com/~nr