Bypass cap's

[jhaible]

> > >Is noise to and from the board via suply lines really that much of a
> > >problem?
> > 
> > Sometimes. To be safe, (isn't an overkill...) place regulator IC's
(7815
> > and 7915) at the supply rails of each circuit board. The main supply
should
> > be at least 18 volts, to make things work.
> > 
> 
> The regulators are so cheap now, its really no problem to do this and
> may save you many problems..
> 
> Rob
> 

I had a lot of problems with 7815 / 7915 on board regulators, and 7818 /
7918
pre-stabilized PSU. Don't ask me why, but they failed all the time. (no
destruction,
but latching up in protection mode). I switched to RC4195's and all was
fine.

JH.