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DPRG: Wheel Chair Power
Subject: DPRG: Wheel Chair Power
From: Roger Arrick
rarrick at ix.netcom.com
Date: Thu Feb 20 10:17:29 CST 1997
You wrote:
>You only need the -12 and - 5 volts on a clone mother board if your running
>VGA and RS-232, the +12 volts is for your floppy drives and hard drive and
>the +5 volts is for logic.
>
>So you could build a simple +5 volt regulator circuit with let say 10 to 15
>LM 7805 voltage regulator connected in parallel and some proper cap
>decoupling, this would give you with 12 volts in a "+5 volts at around 15
>amps"
>and that should be plunty for the 386 sx mother board and just use the +12
>volts asis with a few caps.
You really don't need ANYWHERE NEAR what a normal pc supply delivers. My complete 386
system, hard drive and all draws less than 2 amps on the +5 and < 1amp on the +12v. I
can't imagine what would consume 15A on the +5v - You would need 14 awg wire!
On-board arc welder maybe?
Roger.
--
/--------------------------/---------------------------/
/ Roger Arrick / Arrick Robotics /
/ roger at robotics.com / P.O. Box 1574 /
/ Ph: (817) 571-4528 / Hurst, Texas 76053 USA /
/ fax: (817) 571-2317 / http://www.robotics.com /
/--------------------------/---------------------------/
Time and accident cannot replace intelligence and purpose.
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