I'm looking for a technical description of just how these sensors work.  Google has given me alot of vendors and devices, but so far havent seen anything about *how* they work, etc.
 
Has anyone ever used one in a project?
 
 

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist