Re: Tiny little ATX supply.

[PZ <skierpaul@yahoo.com>]

On Aug 14, 5:59 pm, Tristan Mumford <xtristan.xmumf...@xgmail.xcom>
wrote:
> PZ wrote:
> > James Littlejohn had something similar that he demoed at Kfest this
> > year.  It was a board with a 2.5"x2.5" footprint that took a 12v DC
> > input off of a Wallwart and converted it to +12, -12, +5 and -5 volts
> > in the GS.  It created a cavernous amount of space inside the
> > machine.  It created enough room that someone could be able to
> > internally mount both a 3.5" floppy and a half height CD rom drive
> > inside the case if one desired.  The WallWart was quite small in size
> > as well.  The GS draws far less power than a modern PC notebook does
> > these days.
>
> So he was using something like a Mini-ITX supply? They sound similar,
> although I've never checked if the Mini-ITX supplies have -5v.
>
> Tristan.
> --
> ----->http://members.dodo.com.au/~izabellion1/tristan/index.html<-----
> =====       It's not pretty, it's not great, but it is mine.       =====

He was using a Switched DC-DC converter.  Since the external WallWart
brought the voltage down to +12v DC, the little PCB only needed to
create -12 and +5.  Littlejohn used a small voltage regulator to
create the additional -5v, I believe.

- Paul