Forgive my ignorance, but in what circumstances would this be a preferred method of power monitoring? When would it be a better choice than to simply use a B.O./supervisor chip on the output? I would think that it might be good to know when the regulator is operating in the range where regulation will be compromised, but what advantage would there be, or of what use would this have? Chris -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body