Re: QUESTIONS ANSWERED
From: Duane C. Johnson (redrok_at_redrok.com)
Date: 07/07/04
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Date: Tue, 06 Jul 2004 22:05:38 -0500
Hi Harry;
Harry Conover wrote:
> Actually no PC supply of which I'm aware is capable
> of putting out 12V at more than a couple of amps.
> Perhaps you fail to grasp the distinction between a
> PC, AT, and ATX type power supplies? Do you think
> that's possible? Notwithstanding, none will function
> well in the proposed application.
>
> Then too, you may also not realize that more than 12V
> is required to properly charge a 12V lead-acid battery
> to capacity. Try starting with a current limited source
> of 16V or so, and then taper the charging current as
> the battery approaches fully charged condition.
> Do you believe that a desktop computer power supply
> will do this for you without making substantial
> internal design changes and additions?
> Duh!
> Harry C.
I agree!
Not to mention that usually this type of supply only
hard regulates one main channel and the rest are slave
or side channels. Generally the main channel has the
best regulation.
The 12V side channel current is dependent on how much
current is being drawn by the main channel. This is
kind of wasteful if you have to put a dummy load on
the main channel in order to get the side channel to
work.
These computer supplies are just too specialized for
this application without a lot of modifications.
Duane
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- Next message: LongmuirG: "Re: Mook's quote about nuclear being a "low grade heat". Is it true?"
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- In reply to: Harry Conover: "Re: QUESTIONS ANSWERED"
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