dumb question...but what exactly is the PIC going to be doing? Seems to me, if you choose a nanowatt part, you could just run it right off the battery bank? __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist