Path: utzoo!utgpu!news-server.csri.toronto.edu!qucdn!leek
Newsgroups: comp.sys.amiga.hardware
Subject: Re: UnInterruptable Power Supply
Organization: Queen's University at Kingston
Date: Friday, 7 Sep 1990 22:41:14 EDT
From: <LEEK@QUCDN.QueensU.CA>
Message-ID: <90250.224114LEEK@QUCDN.BITNET>
Distribution: world
References:  <02284.AA02284@lemsys.UUCP>

I hope you are not going to build the UPS by yourself.  It is something
that protect you rather than another part of a system that costs failure.
(ie. you want to use something that is proven, not to to hardware alpha
testing/debugging with your own computer)  There are a lot of design
decisions/trade-offs that has to be made.  This is not a weekend project.

You might want to look some of the newer UPS systems for the PC.  There is
one that have a built-in battery backed/recharging system that is built into
the power supply.

I would think it is much easier to design a backup power system that supply
the DC voltages rather the going through an DC->AC convertion.  Power MOSFET
are easy to control and quite good at switching high currents at a moment's
notice. AS for the monitor, you'll have to get a UPS or look for one that uses
12V DC.

If you need more help, post to sci.electronics next door. :)

K. C. Lee
Elec. Eng. Gr ad. Student: Power Option ;(