cluster
Duane Attaway
dattaway at attaway.net
Wed Sep 25 20:31:02 CDT 2002
On Wed, 25 Sep 2002, David Nicol wrote:
> There's this very old and neearly dead daydream of having
> a public internet-login at the Infinite Sun space, 1732 Oak,
> downtown. That might be a good place to set up the cluster.
> Especially if they succeed in putting a windmill on the roof
> for the electricity. Anyone feel like putting together
> a general power supply that can switch 24VDC into everything
> you need to make AT* motherboards happy?
How many watts do you need? 24VDC into 120VAC? Many of the larger UPS
units use 2 12 volt batteries. I've seen a lot of them discarded, just
because the specially sized batteries died.
I have a $60 600watt inverter from walmart that can easily be converted to
24volts. The conversion would only require a small regulator for the
control electronics and a few windings taken off the primary.
A DC to DC converter would likely be more expensive, because DC-AC units
are incredibly popular. I suppose I could make one. DC converters are so
much fun to design and like rocket science. One mistake creates wonderful
fireworks and its back to the drawing board. It usually takes a few dozen
tries to get a design perfected. Not something I'd like to test with
nostolgic motherboards. Except on the Forth of July.
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