Re: [EE] looking for negative 5V regulator or circuit

Harold -

I didn't realize that - after seeing your email I tried it with a 10
volt supply and a 5 volt regulator and it didn't "work", luckily no
smoke was released :)

So in other words a regulator output can source current but not sink it ?

Chuck

On Wed, Jun 11, 2025 at 4:43 PM Harold Hallikainen
<[email protected]> wrote:
>
>
>
> On Wed, June 11, 2025 2:30 pm, Chuck Olson wrote:
> > How about a 7 to 8 volt positive LDO ?  Use the regulator output to
> > establish the ground of the PIC and the HC595 ?  I think there are more
> > positive LDO regulator choices than negative.
> >
>
> A positive voltage regulator can pull the output up, but not down. Here,
> the +7V is being pulled up by the load and needs to be pulled down by the
> regulator.
>
> Would a 7V zener to ground work?
>
> Harold
> https://w6iwi.org
>
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