On 2/8/06, Bob Axtell wrote: > > Just noticed my old notes. > > That relay was used to pulse - dial as well, meaning that the number of > transitions is probably 100+ for each CC transaction. It got a LOT of use. Credit card terminals?? I spent almost 10 years designing those :) -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist