AVR-Chat

Pin-18 (AVCC) is floating; it needs to be connected to the supply. And at least one .1 mfd 
cap between the supply and ground for bypass.

Bruce

Dave VanHorn wrote:
> 
> >
> >(http://www.dpicts.com/ForumPics/mega8a-2.jpg) to attach to the 6 pin
> >connector on the stk500 to program the chip.  I am not changing any
> >jumpers or anything on the stk500 (maybe this is my problem).  I have
> >made 4 different PCBs thinking that I had a trace wrong or broken, but
> >all pcbs and all three chips have failed.  Anyone have any suggestions
> >as to what I might be doing wrong?
> 
> The target is powered from somewhere, right?
> 
> What do you get when you try to read the signature?