Just to be the pest of the day... :) what means myfarad? I don't have any farad, do you? :) of course everybody knows you meant uF (micro Farad), but "uF" is easy and the correct way to write it... I told you... to be the pest of the day... :) Wagner. MILTON MEDICINTEKNIK KB wrote: > > I have found that the PIC is very reliable and tolernat to noice. BUT if you don't have the 0.01 myfarad capacitor across it's Vcc/Vdd, it is very sensitive. In your case maybe try«0.1 AND 1000pF instead. Close to the chip. >