Re: Simple in-car PSU design?

"Carl Farrington" <carl@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
wrote in news:eh242v$4pf$1$8302bc10@xxxxxxxxxxxxxxxx:

Hello everyone.

I wonder if anybody could point me towards a simple multi-output PSU
which can be run from a cars' ~12 - 14v supply?
I intend to run three devices. A small digital video recorder which
requires 5vDC @1A, a CMOS camera which requires 12vDC @1A, and another
camera which probably requires between 5vDC and 12vDC (don't have
specs to hand).

I don't need any funny auto power-off switching like the in-car ATX
computer power supplies do, as I intend to leave the system running
24/7. I suspect the actual current requirements are very small. The
above ratings are simply taken from the included a/c adapters. I could
measure actual current usage later, but suspect the camera to be more
lik 200ma, and not much more for the recorder.

Does anybody know of either a very simple schematic, or a finished
product which I could buy that would run these devices?

thanks very much,

Carl




Given their cost, you might as well use exactly what you're reluctant to
use. PSU's for mini ITX boards often go so cheaply on eBay that it's worth
it, and you can ground pin 4 (I think it's pin 4, the interweb will have
more certain info in ATX PSU terminals). The ones built for cars have extra
filtering and reservoir caps, and they're a far better bet than trying to
design one from scratch.

They even have nice wires trailing off them ready for connecting stuff.
.

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