Now I don't mean some > super scope with > +100MHz sampling more something simple with specs like: I have a very simple scope project built around our APP-II (really a PIC16F873) at: http://www.al-williams.com/awce/app2.htm (this was a previous "Stamp Project of the Month"). Not very fast, but workable. Even simpler than what you propose. I've also done a "logic scope" in Altera, but I haven't released it yet -- will probably run somewhere eventually though. Regards, Al Williams AWC * Control 8 servos at once http://www.al-williams.com/awce/pak8.htm -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu