i'd say that it was almost definatly the other way around in a breadboard situation i havent had a problem relating to bypassing, they are one of those 5% things, ie they are only an issue in that 5% of the time when something unusual is happening ;->. Mclr is *vital* that is one of those 99.95% things it has to be right or it wont work at all -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Robert B. Sent: Thursday, April 15, 2004 1:37 PM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [PIC:] Odd behavior... Fixed! Thanks to everybody who helped me get this working again. I must admit that I'm disappointed the problem was so simple! The problem was (primarily) the lack of a 100nf bypass capacitor, and (secondarily, perhaps) a floating /MCLR. You were a great help to me tonight, I hope maybe some day I can return the favor! -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body