Perhaps you are correct. After I sent the "fixed" post, I realized that I had already done a direct connection between Vdd and MCLR (solder brindge between adjacent traces) before I soldered in the bypass cap. Since then I undid the solder bridge and added a diode instead. So either problem could have been the primary one since I did not test it until both were fixed. At any rate, it's working now and I'm very grateful. ----- Original Message ----- From: "Jake Anderson" To: Sent: Wednesday, April 14, 2004 10:59 PM Subject: Re: [PIC:] Odd behavior... Fixed! > 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 -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu