Spehro Pefhany wrote: > See the attached diagram-- at the detent position, the A signal is > always high (switch open with pullup) and the B signal is > indeterminate (this is done to relax manufacturing tolerances) That is unusual from my experience. For encoders with detents using mechanical switches, the detent state is usually both switches open to minimize power drain. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist