19 Aug
2005
19 Aug
'05
2:47 p.m.
On Thu, 18 Aug 2005, Tom Jennings wrote:
(sorry for attribution - I've lost Tom's earlier post)
Out of interest, how are you doing the +12V supply rail? Or don't you need
one in this particular situation?
I never liked the idea of going the route of a power inverter (car battery
to inverter to conventional switchmode back to DC voltages) because it's
darn wasteful of both power and space. But given that battery voltage in a
car ducks below 12V on occassion (not to mention being noisy as hell) I've
always wondered how to do power regulation to drive a computer - I've never
found a decent DC-DC circuit to do the job and provide enough start-up
current to power a hard disk...
The +5V supply's the easy bit!
(OK, so sorry of OT-ness too!)
cheers
Jules
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So I'm making a computer for my car (freeBSD
on a mini-ITX box)
and I'm hacking a "terminal" in an old AM radio chassis (a PIC,
two rotary encoders (VOLUME and TUNE), two momentary switches on
the shafts and a 4x20 LCD) to run a Perl script that drives
mpg321.
Sweet! Sounds like a good project for Make magazine.