hi,

Thanks alot for your prompt reply mister e ! I will try that code change and see what happens. A few more questions: is any type of pullup/down resistor required on the adc input, or would that cause inaccurate readings ? And according to your calculations, would upping the sample time to 20uSec be better and how do control the input impedance to get the right value? Also, how do I convert my adc "A0" value to volts?

thanks again,
BTW, nice snowy winter so far....Eh !

John