Re: Heads Up for Power Supply deal...

Not so fast Jon. Typically it is safe as you say but depending on the circuitry, there might also be sense amplifiers, over current
protection and not to forget electrolytic output capacitors that might be fed 18 volts in reverse. That can be ugly!
Bertho
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> From: Jon Elson <jmelson@...>
>
> Bertho Boman wrote:
>
> > From: Bertho Boman <boman@...>
> >
> > That is usually OK but it is also an easy way to kill power supplies if they are not designed correctly. For example, if the fuse
> > blows in one supply the other one will feed power backwards into the one that is not turned on and often kill it.
>
> Yes, in a linear regulated supply, this could indeed happen. In a switching
> regulated supply, there is just a transformer winding and a diode, so there
> will be no harm to it.
>
> Jon