> One thing I'm going to have there for sure, is designing a circuit > from a truth table, and vice versa. Any other suggestions? I was going to suggest gates How about a little Boolean - AND, XOR, IOR two numbers. And binary addition and subtraction Spell Schottky ;-) Deduce the Q output states of a digital counter, a 4040 for example, that's been clock a given decimal number of times Four inputs into a chain of logic gates - what's the output ? (Don't be too mean, supply the truth tables, writing 0's and 1's on the gates allowed) -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist