At 06:28 AM 5/11/2011, Sean Breheny wrote: >Well, I was not directly involved in choosing this part but at this >point it is one of several being tried, of different technologies. >This is not actually going to be used to sense a human finger but >rather contact by cardboard boxes and other items in an automation >system, and he doesn't really care too much about the ability to tell >where (along the length) it was bumped, only whether contact was made >or not. This part is nice because it is sealed, cheap, rugged, and >very long (about 50cm) - the contact area he needs to sense is long >and not a point. What happens if there is NO voltage applied across the strip? In other words, just use it as a contact sensor. Connect both ends=20 of the strip together and to one supply rail (I would use Gnd), use a=20 high-value pull-up resistor on the center conductor. It might be worth checking with the manufacturer to see if this is reliable= .. dwayne --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .