Re: gEDA-user: basic anti-EMI design q

[Bill Sloman <bill.sloman@xxxxxxxxx>]

At 12:52 24-3-2006, Karel Kulhavy wrote:

> On Fri, Mar 24, 2006 at 11:04:04AM +0100, Bill Sloman wrote:
> > At 05:21 24-3-2006, you wrote:
> > >DJ Delorie wrote:
> > >
> > >>It's not the drivers that mess up, it's the octal latch.
> > >
> > >
> > >if the existing latch is in the interface with ribbon cable to the
> > >PC  - there's your problem.
> >
> > Have you grounded every second wire in the ribbon cable? It sounds
> > extravagant, but if you need shielding, that's a commonly used way of
> > getting it.
>
> It isn't. If it were, there would be no rule that UTP cables should be
> put min. 20cm apart from power lines.

Unshielded twisted pairs being used where and for what purpose, Karel?

There are so many possible explanations for this requirement, in so 
many possible contexts, that it seems unlikely that this "rule" 
actually supports your claim.

Bill Sloman, Nijmegen