From: Patrick (plm@laescuela.com)
Date: 04/07/00-01:17:45 PM Z
I for one wouldn't want to bypass the switchers that they have
onboard. There is delicate filtering in those supplies to avoid transients
associated with the high speed digital switching. That is probably why
they had a separate power supply for the main unit. I doubt you can
sufficiently filter if you do a 12V to 5 and 3.3 espeically if you have
more than a couple of inches of cord between the supply and I-Opener.
At 10:49 AM 4/6/00 -0400, you wrote:
>Seems everyone looks at the power supply problem from the wrong
>perspective. Everyone wants to condition the voltage to the input
>requirements of the onboard switcher (which is at best, probably 80%
>efficient). Bypass it instead, all you then need is the lower 5V and 3.3V
>(or whatever the original outputs are) and you save the extra conversion
>losses imposed by the onboard PS.
>Peter
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