> TTL's too much work, though - CMOS, now... > y'all know there's a "discreet logic" contest going on, similar to the =20 recent "555" contest? There are some pretty nice prizes. http://dangerousprototypes.com/open-7400-logic-competition/ BillW --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .