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- Path: 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
- Lines: 28
- Sender: cstadbg@csv.warwick.ac.uk
- Distribution: world
- Message-ID: <1edge6INNd93@clover.csv.warwick.ac.uk>
- References: <1992Nov17.165023.29174@julian.uwo.ca> <1992Nov17.115412.26749@doug.cae.wisc.edu>
- NNTP-Posting-Host: clover.csv.warwick.ac.uk
-
- 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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