10 Oct
2000
10 Oct
'00
2:30 p.m.
On Tue, Oct 10, 2000 at 05:54:49PM -0700, Chuck McManis wrote:
Why not buy a "dead" UPS that can over the
wattage of your system and
install a 12V in plug on the back. Most of these use a 12V DC input and
provide acceptable power on the output. Its cheaper than simply buying a
12V -> 120V inverter @600Watts or so.
Because it's grossly inefficient. Why convert from 12V to 120V AC and
then back to 12V, 5V, etc... they design some really efficient DC-DC
converters for laptops (to convert battery voltage to 5V) so it should
be possible (cheaply) for desktops also.
--
_______ Shawn T. Rutledge / KB7PWD ecloud(a)bigfoot.com
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