Re: LM31T as AC voltage regulator for Commodore computers PSU

From: Mike Stein <*mhs.stein_at_gmail.com*> Date: Sat, 18 Jun 2022 12:45:16 -0400 Message-ID: <CAHHfo1u6qOckNOog2EtuGjTBStVeJTE0VOYrAjthe1ci62L+6Q_at_mail.gmail.com> · mhs.stein_at_gmail.com

Definitely interesting, but wouldn't it be simpler/cheaper to just use the
transformer out of a 9V wall wart?

m

On Sat, Jun 18, 2022 at 11:42 AM <tokafondo_at_tokafondo.name> wrote:

> TI's version of the LM317T's datasheet has something interesting to see in
> its page 15.
>
> It can be seen only in TI's datasheet, and not others AFAIK.
>
> They show how to use two LM317T IC in a way that from a 12VAC source, take
> it down to 6VAC. I'm sure that with changing the values of the resistors
> needed, 9VAC can be got, instead of the 6VAC of the example.
>
> It seems that this could be a way to use 12VAC transformers, widely
> available, when designing a PSU for a Commodore computer that would need it.
>
>