12VDC ATX psu for PC

[WalkTall]

Hi,
Can anyone perhaps please point me to a circuit diagram for a ATX PSU for a
PC with a 12VDC supply voltage(+/-300W)? I've got a 12VDC backup system,
solar and wind, and do not want to use an inverter. The 3 & 5V rails are not
a problem, but the-12V, +12V seems to be. Should I step up the 12V to 24V
with an DC-DC converter and then split it to 12V-/0/12V+? Will this be more
efficient than a 12VDC to 220VAC Inverter?
Thanx in advance,

 

[Andrew Gabriel]

Hi,
Can anyone perhaps please point me to a circuit diagram for a ATX PSU for a
PC with a 12VDC supply voltage(+/-300W)? I've got a 12VDC backup system,
solar and wind, and do not want to use an inverter. The 3 & 5V rails are not
a problem, but the-12V, +12V seems to be. Should I step up the 12V to 24V
with an DC-DC converter and then split it to 12V-/0/12V+? Will this be more
efficient than a 12VDC to 220VAC Inverter?

I've seen 12VDC PC power supplies for sale at computer fairs.
I think the target audience are people who put a PC in their
car as the basis for their car audio system.

All rails are regenerated, as the swing on a car supply from
less than 10V during starting to 14.5V charging is far too
much for any PC rail to sustain directly.

 

[WalkTall]

Hi,
Can anyone perhaps please point me to a circuit diagram for a ATX PSU for a
PC with a 12VDC supply voltage(+/-300W)? I've got a 12VDC backup system,
solar and wind, and do not want to use an inverter. The 3 & 5V rails are not
a problem, but the-12V, +12V seems to be. Should I step up the 12V to 24V
with an DC-DC converter and then split it to 12V-/0/12V+? Will this be more
efficient than a 12VDC to 220VAC Inverter?
Thanx in advance,

Thanx all,
I think that Palindr?me idea will be the best solution for me.
I've got a couple of ATX PSU's lying around to experiment with. (Any
circuits for dc to dc converters?) Should it be a 12VDC to 220VDC inverter
or can I tap in somewhere on the PSU PCB to supply it with a lower voltage,
say 24VDC? (I'm not so clued-up on Switchmode Power Supplies)
I've got grid power on site, so the supply is more for power failures than
anything else, but I would like to make it as efficient as possible.
My Solar/wind system is 12VDC, charging a bank of batteries. Mostly used to
power lights, my PC and a 12VDC capable TV, the essentials ;-) for now, but
I would like to use it more permanently in the future as I expand it.
Money IS a problem, so I would rather build than buy.

WalkTall
PS - Apologies for the late post, but I only go online about twice a day.