Well, then, the proof is in the pudding =) I read it several times and managed not to understand it every time I read it. Thanks guys. -Mario -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of Peter van Hoof Sent: Wednesday, November 30, 2005 5:35 PM To: Microcontroller discussion list - Public. Subject: Re: [PIC] ICD2 <--> PIC power supply question --- Olin Lathrop wrote: > Mario Mendes Jr. wrote: > > But, the other way to do it, the way I do not believe to be > correct, > > is to have the PIC connected to the same +5v as everything else, > but > > not the icd2 +5v, and connect the circuit's ground and the icd2 > > ground together. > > I've always connected everything, powered my device with its own > power, and > told the ICD2 not to power the target. That's all within spec. The > ICD2 > will even report the target voltage to you. > And according to the icd2 manual this is the right way to do it if your pic is running at a lower voltage as well , the buffer chips in the ICD2 (If we are talking about an original Microchip one) are powered off the same voltage as the target circuit and thus providing level conversion of the logic signals. Peter van Hoof pvhoof@yahoo.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist