Common supply

[Christian Hofmann]

On Wed, 20 Jan 1999 00:39:49 -0800
Irish <irish at eskimo.com> wrote:

> Crowbar circuit? 

That's an overvoltage detector that burns a PSU fuse to protect the gear
connected. I think it's called crowbar because it's a pretty brutal
circuit, e.g. triggering a thyristor in parallel to PSU output, i.e.
simply shortening it. Better to blow up a fuse (or even the PSU) than a
bunch of synths.

Btw, I'm a bit reluctant to replacing a couple of wws by a single PSU.
All those warts have separate grounds, this doesn't have to be signal
ground. Worst case would be a device having the wart's + connected to
signal ground. Even in other cases there could be a ground loop. And then
there are AC warts as well...
Call me nuts, but separate wall warts are part of a healthy ground setup.

cu
Christian

> On Wed, 20 Jan 1999, you wrote:
> >No, it's a GOOD idea, IMHO!  Put in a crowbar circuit for overvoltage
> >protection,
> >so if the big supply goes awry, it won't ruin everything.
> >
> >-Art (thawing out from a five-day power outage)
> >
> >-----Original Message-----
> >From: Irish <irish at eskimo.com>
> >To: DIY <synth-diy at mailhost.bpa.nl>
> >Date: Sunday, January 17, 1999 7:01 PM
> >Subject: Common supply
> >
> >
> >>Like everyone else I'm sure, I am amassing this collection of warts on my
> >>wall/floor/etc. Any reason I can't get/make a 9V 3A supply and just wire
> >>everything to it? (9V because almost everything I have is 9V)
> >>Is this a Bad Idea?
> >>
> >>Thanks,
> >>Irish