12 Oct
2000
12 Oct
'00
2:57 a.m.
At 05:54 PM 10/10/00 -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.
At 07:30 PM 10/10/00 -0700, Shawn T.
Rutledge wrote:
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.
Not only have I wondered about the most efficient way to
power a PC inside a car, but other devices... a few months
back I was looking for a 12 volt to 6 volt converter to
power a Sony GV-9 video deck in the car, to no avail.
All the units I found were too low in amps-out. I avoided
the 12v -> 120v -> wall wart solution as too gross and inefficient,
but I guess it would work.
- John