On August 30, 2005 11:22 am, John Nall wrote: > Now this seems too simple, so I figure I must be missing something. > Does anyone see any possible problems that would make it a > non-starter? (The project has to do with a trickle charger for my > sailboat, which normally has no access to shore power). Some processors such as the older Z80 has/had trouble with a slow rising voltage and so would not reset properly, therefore, use the watchdog timer to your advantage by using few of them interspersed about as far apart as possible (aim for about 2 Sec if you decide to use the x256counter else use a smaller spacing if you use a smaller divide on the watchdog counter, i.e. about 8msec if no counter used). If your processor starts dropping-out due to lack of voltage, the long distance between (your program) watchdog resets should help stop your program from creating havoc on the hardware. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist