>Unless you guarantee a minimum load it will >be 'chaotic' in operation. I understand that. My reckoning is that the minimum load will be a 16F877(A) running at 3.6MHz, and miscellaneous 74HC logic, along with a MAX202, an FTDI FT232B and maybe a power LED, so I figured a minimum load should not be too much trouble. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads