> Or 4000-series CMOS logic. Nice thing about 4000 series in this > application is that it can operate on unregulated 12V.
I thought of that, but a linear regulator just for the pic would be cheap, and you get debounce, multi-input state machines, and a watchdog for no extra cost... Even if I ran a 4000 right on the 12v, I wouldn't count on that 12v to be very clean if it has motors running off it. Electrically braking a motor with an H-bridge can spike the power rails. And a pic + regulator (sot-26 + sot-323) is probably going to be smaller than the equivalent 4000-series chips anyway. But of course, there are zillions of ways of doing it, it's up to the designer to pick what's best for their needs. _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
