> I'm using 5V instead of the 9V indicated in the schematic I believe Vcc should be at least 6V for a 741. If that's the case you'll be lucky to get it to behave properly at 5V -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body