1 farad capacitors

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From: Eric Friedman (mcelover@yahoo.com)
Date: Wed Mar 09 2005 - 13:44:04 PST 

Message-ID: <20050309214404.33330.qmail@web30208.mail.mud.yahoo.com>
Date: Wed, 9 Mar 2005 13:44:04 -0800 (PST)
From: Eric Friedman <mcelover@yahoo.com>
Subject: 1 farad capacitors

hey all
 
does anyone know a good source for 1 farad 5 volt capacitors? we've been looking through the Jameco catalog and online and its a bit overwhelming and hard to find what we want. We ordered some from Jameco and they actually turn out to be battery back-up capacitors which release their charge very slowly (see below). We have one NEC brand capacitor which works great. any ideas?
 
for the physics types: how do you make a capacitor that releases its charge slowly? the caps we got from jameco wont even discharge when we short circuit them with a wire! so what's the deal? i mean, don't we tell our students that capacitors can release their charge all at once like in a camera flash?
 
happy charging
 
-eric

                
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