> Things like range-checking of inpus will also be = easier to do in a > micro. Why not go all the way and use a PC running Microsoft Windows to control the unit in real time through the USB port ? At least the GUI would be nice. Since someone is bound to sue you over this anyway, what difference does it make ? (just kidding) Peter -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.