Quote Originally Posted by igeorge View Post
Thank you Demon,
I am testing now a ACS712 and in the scope it looks like a sine wave - 60 HZ, swinging between +1 volts to + 3.5 volts
I will get tomorrow an LTC1966 from Linear Technology , which is an RMS to DC converter and start working from there
Regards
Ion
a liitle more meat on how you anticipate handling the 'trapping' of an element going open cicuit might be useful..... ie the whole signal chain, because I'm left wondering why you're using an RMS to dc converter (and a comparator) for a simple task that a pic can readily do for you.