Russell McMahon wrote : > - Create an input voltage monitor that provide a logic output when the input > power supply comes out of spec in a way that you have determined should > trigger shutdown. Or don't reinvent the wheel and *buy* on instead. There are many different "supply-voltage supervisors" from most IC manyfacturers. Jan-Erik. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.