Thanks for your enlightenment. I went the route of a current transformer, just to keep out of the high voltage circuit. Did a google seach to read up some more on it. Snagged one of those iron donughts you see on computer cables for the core. When I get to the point of filtering the signal, I may also incorporate the opto as Acetronics suggested. Seems to work pretty good. I have to play around some more with the # of turns on the secondary to get the right voltage. Built it last night while watching TV... my kids thought it was pretty cool when I explained the operation. Thanks again!