AVR-Chat

On 8 Nov 2007 at 7:51, David VanHorn wrote:

> On Nov 1, 2007 3:19 PM,  <enkitec@gmail.com> wrote:
> >
> >         I have fried a couple AVRs using a LPT port SPI programmer.
> >         The problem went away when I first connect a ground wire between the
> > PC and the hardware being programmed.
> >         The SPI cable will be inserted only after the ground is connected.
> 
> It should be obvious, but the ground is a required connection to the
> target system.
> 

	Sure, the SPI cable has a GND wire, but I guess it wasn't making 
contact first and some static was damaging the IC under programming.
	I avoid that by using another GND wire, separated from the SPI 
cable.

	Mark Jordan