Re: Using big caps as computer power supply filters (?)

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Article #14713

#14713

From: Mr M J Brown
Date: Wed, 18 Nov 1992 13:28

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In article <1992Nov17.115412.26749@doug.cae.wisc.edu> kolstad@cae.wisc.edu (Joel Kolstad) writes:
>In article <1992Nov17.165023.29174@julian.uwo.ca> wlsmith@valve.heart.rri.uwo.ca (Wayne Smith) writes:
>>I've got some big electrolytic caps (20000 to 60000 uf, 16 to 40 volts),
>>and I was thinking of putting them across the 5V and 12V power supplies
>>in my pc.  I would think that cap's that big would provide maybe 1
>>second of backup power.  
>
>I think that asking for one second would be a little much.  Here's hwy:
>
[ Maths deleted ]


>
>						---Joel Kolstad

Yes.....but putting capacitors this big across your PSU will totally blow the
output of the PSU....Consider the current that will flow at switch on....
It will be *huge* .... your PSU cannot supply this (unless you have a small
nuclear generator on hand.... :-) )

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    _/_/  _/_/   _/   _/_/     _/          |         Michael Brown
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  _/      _/   _/   _/_/     _/            |   cstadbg@csv.warwick.ac.uk
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Path: arc1-ca.pugleaf.net!sparky!uunet!pipex!warwick!warwick!not-for-mail
From: cstadbg@csv.warwick.ac.uk (Mr M J Brown)
Newsgroups: sci.electronics
Subject: Re: Using big caps as computer power supply filters (?)
Date: 18 Nov 1992 13:28:38 -0000
Organization: Computing Services, University of Warwick, UK
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