Rex wrote: "Take note of your regrigerator at 2 in the morning. I will probably indicate that your freq increases markedly in the wee hours if you are on a bulb blower line." That means *most* of us in the US would see this - as we are all (*) tied to the same 'grid'. I suspect it that it seems to be running faster because of the higher line voltage at that time of night. (*) There are a few exceptions, such as Texas - who once upon a time was on it's own isolated grid and I think still is even now. Jim -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads