Re: [CAD_CAM_EDM_DRO] Re: AT Tower Power Supply switch wiring

Hi, almost all computer supplies are switcher types and a 1/2 ampere 5 volt
load will usually keep these supplies from locking up or not comming up. I
usually put that resistor inside in the fan air stream for cooling. cul
brian f.

----- Original Message -----
From: Gary Wheeler <g.wheeler@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, December 31, 2001 1:41 AM
Subject: [CAD_CAM_EDM_DRO] Re: AT Tower Power Supply switch wiring


> Many thanks to John Kleinbauer, he answered the question. Great service!
> Sorry to bother the Forum.
>
> For others who have a similar question later, the answer is:
> When the switch is pressed the Blue and white connect.
> The Brown and Black connect on the other side (of the switch.)
>
> BTW, for an ATX type power supply (used away from a computer) the
> motherboard connector's pins 14 & 15 must be connect to each other for it
to
> run. Also, a load must exist on the 5v side for it to remain powered up.
> Apparently you're not supposed to run these power supplies without load.
>
> Legal disclaimer: No warranties expressed or implied, your mileage may
vary,
> wear protection, and remember, drink, don't drive...
>
> Gary B-{)}
>
> ----- Original Message -----
> From: Gary Wheeler <g.wheeler@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Sunday, December 30, 2001 3:35 PM
> Subject: AT Tower Power Supply switch wiring
>
>
> > Help! Am trying to use an old computer power supply to run a CNC
> > controller. Benchtop dremel machine, Kleinbauer.com NCF2002. Simple
> unit,
> > will be using aluminum storefront window frame, but am having trouble
> > powering up the power supply. Mr. Kleinbauer hasn't seen one like it.
> >
> > Would like to use an old AT tower-type power supply, 230 watt DC. But,
> > can't figure out which wires were connected to turn on the supply. It
was
> > from a now obsolete full height tower case which had a line voltage
> (DPDT?)
> > switch on the front of the chassis. It has no power switch on the
supply
> > itself but instead uses 5 wires apparently of line voltage size with
> > individual spade terminals. Which would connect to front of the
chassis.
> > One wire is a ground (green), another hot (white). Two are apparently
> > reduced line voltage, about 100 VAC (blue, brown). One wire is
apparently
> > the neutral (black).
> ...
>
>
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