Jinx wrote: > Open collector RA4 spec is > a lot higher, 14V vs Vdd + 0.3V Only on the really old PICs. It's something like 7 volts on anything current or was-recently-current. 16C71, no problem :) Cheerful regards, Bob -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist