home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!grebyn!pyrdc!gossip.pyramid.com!decwrl!mips!darwin.sura.net!cs.ucf.edu!tarpit!fang!att!cbnewsk!stevenh
- From: stevenh@cbnewsk.cb.att.com (steven.t.heinsius)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: Power Supply Query...
- Message-ID: <1992Aug19.135211.14933@cbnewsk.cb.att.com>
- Date: 19 Aug 92 13:52:11 GMT
- References: <SENOL.92Aug17230408@caroline.ee.pitt.edu>
- Distribution: comp
- Organization: AT&T
- Lines: 36
-
- Yes it is needed (low current).
-
- I did this a few weeks ago--- its real simple
- Go to Rat Shack a buy a 7905(i think that is the number
- it looks like a to220 or to3 case -- doesnt matter).
- This is a voltage regulator
- a- hook one pin to ground
- b- hook one pin to -12V
- c- the last pin is you new -5v
-
- note the mounting tab is connected to one on the pins
- and needs to be insulated from
- the chasie ground
- see the package for details.-also it is a good idea
- to use a 10uf cap on the -5v to keep things stable.
-
- Becareful about the wattage --- most xt supplies are 100-150 watts
- and most of the ATs are 200 watts. i dont have a lot
- of cards or disks so mine works fine.
- if you plan on using big disks you may be in trouble.
-
- Steve
- ps if you need some more help drop me a email.
- ps2 new power supplies aren't to expensive---if soldering makes
- you scared
- ------------------------
- From article <SENOL.92Aug17230408@caroline.ee.pitt.edu>, by senol@caroline.ee.pitt.edu (Senol Kucuk):
- >
- > Howdy. I'd like to use an older (PC type case) power supply
- > with a relatively new 286 AT motherboard. However, the power supply I
- > got has no -5V output. Just wondering if the -5V input is really
- > necessary for the AT motherboard. Thanks in advance...
- > --
- > --
- > Senol Kucuk, Department of Electrical Engineering, University of Pittsburgh
- > {senol,snkst4,kucuk}@{{unix,vms}.cis.pitt.edu,pitt{vms,unix}.bitnet}
-