I'll add another vote for the DS18S20. I'm in the middle of building a remote (RF) temp sensor. The DS18S20 "worked right out of the box", plenty of sample code to be had too (though I think the delay routines in the sample on piclist.com are in error, I modified them before I tried them, working for me). Kevin -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body