I couldn't find any specific information, but maybe look into capacitive proximity sensors. My guess is it's relatively the same concept, just reworked and machined into a precise device. I could be wrong. Good luck. Peace MJ Brush ----- Original Message ----- From: "Edward Gisske" To: Sent: Wednesday, May 26, 2004 12:00 PM Subject: [EE]: Theory of operation of an electronic caliper? > Does anyone have a link to a tutorial on how capacitance-based digital > electronic calipers work? > Thanks, > Edward Gisske, P.E. > Gisske Engineering > 608-523-1900 > gisske@offex.com > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads