[sdiy] Converting Computer Power Supplies

[Happy Harry]

Usually the minimum load is 20% of the rated output...

for a 5V / 10A supply thats 2A...

Many of these supplies are rated for 20...30....40A at 5V...

Ouch !

H^) harry


>From: Tony Clark <clark at andrews.edu>
>To: Synth-DIY <synth-diy at node12b53.a2000.nl>
>Subject: Re: [sdiy] Converting Computer Power Supplies
>Date: Wed, 23 May 2001 15:19:09 -0400 (EDT)
>
> > If you mean an internal power supply for a desktop...
> >
> > WATCH out !!!
> >
> > These are a switching power supply that needs a large load
> > on the 5V to operate...  Picture the CPU with the little fan
> > as a HOTPLATE !!!
>
>    I think that they typically only need an amp or so to operate, so grab
>a 5 ohm resistor with at least a 10 Watt (probably go 20 Watts) rating and
>hook it up and see if it powers up.  You may need an even heaftier load
>than that.
>    Sometimes the power supply will have the connector diagram printed on
>a label on the side somewhere.  Failing that, check here:
>
>    http://members.iweb.net.au/~pstorr/pcbook/book5/power.htm
>
>    Covers most PC power connector schemes.
>
>    Cheers,
>
>    Tony
>
>-----------------------------------------------------------------------
>   The E-Music DIY Archive - http://aupe.phys.andrews.edu/diy_archive
>-----------------------------------------------------------------------
>
>"We wouldn't want to ship something that doesn't work"
>    - Carl Stork, general manager, Microsoft Windows division
>      Excerpt from EE Times April 2, 2001
>

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