Ok, I've been browsing trying to find the right solution. I'm needing to sense temperatures in a very resonable range, like (-20F,100F). No big deal. I would LIKE to simply use a thermistor and an A/D but I'm having trouble finding any information on the operation of thermistors in general. I've also seen the Dallas Semi 1-wire devices and those seem nice, but overkill if I can simply use a thermistor. The chip I'd LIKE to use is the 16F870, and seems adequate for both jobs. Anyone have any other suggestions/experiences they could lend to this? Much appreciated. nick@veys.com | www.veys.com/nick -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu