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- From: ccowan@slate.mines.colorado.edu (C.L. Cowan)
- Newsgroups: rec.audio.car
- Subject: Re: 1 Farad Capacitor availability
- Message-ID: <1992Nov18.045947.12730@slate.mines.colorado.edu>
- Date: 18 Nov 92 04:59:47 GMT
- References: <1992Nov17.132900@trc.amoco.com>
- Organization: Colorado School of Mines
- Lines: 43
-
- znpt01@trc.amoco.com (Norman P. Tracy) writes:
- :
- : In article <26130110@hpcc01.corp.hp.com>, kirk@hpcc01.corp.hp.com (Kirk Lindstrom) writes:
- : > > Right now i'm looking in the new Pasco Scientific Physics catalog and
- : > >they have for sale a 1 farad capacitor for roughly $19.00.
- : > >The problem is is that it is a 5 volt and not a 12-20 volt as needed for
- : > >automotive use. Does anybody have any idea how to get a 5volt to work
- : > >with 12-15 volts? If so then these would be a lot cheaper than the
- : > >800,000 microfarad that 2000 sells for $125.00...
- : > >
- : > > William C. Devine, II
- : > ----------
- : >
- : > Stack 4 in series and you get a 0.25 Farad capacitor for 4x$19 or $76 that
- : > is rated at 20 Volts. Of course it will take up alot of space.
- : >
- : > I saw an add in some parts mag. for 0.1F 20V caps for $18.95. I'm
- : > thinking this might be a good buy. Size is 2.5"Dia. x 4"Long.
- : >
- : > Kirk out
- :
- : From the 1 F/ 5vDC rating I'm guessing this is a 'supercap' designed for
- : backing up C-MOS memories and clocks in battery powered computers. These have
- : very slow discharge rates (almost like a high impedance battery rather than
- : a cap) and are not designed for bypassing power lines. I advise a little
- : more homework (like a call to the manufacturer) before $pringing $80 for
- : four of 'em.
- :
- : Norman Tracy znpt01@trc.amoco.com
-
- I recently started shopping around Denver area elctronics stores and
- found lotsa caps quite cheap. For instance, I ended up buying two
- 260,000uF @ 15v 18vmax for $4.25 including tax! Of course to keep the
- voltage at 15v it appears that I am going to have to find a couple more.
- The stores I looked in had tons of stuff (and I do mean stuff!) things
- like laser kits, 12v converters, and all the other neat stuff that would be
- needed to do about anything in a car. If anyone is interested in the
- particular stores email me and I'll get back to you. I found mine in the
- yellow pages under "Electonics"
-
- Good Luck,
- Corbin Cowan
- (ccowan@slate.mines.colorado.edu)
-