Hi all,
Roughly how many farads would be needed to replace say a simple 1.5V AA sized battery ? with a similar run time..
thanks,
Chris
battery / capacitors
Oct 19, 2003
6 Replies
exxos responded in news:3f92dd4e$0$6621$ snipped-for-privacy@news.dial.pipex.com like this:
C = IT/V
So for 2000mAH, Vmin 1V, C = 2 x 60 x 60 / 0.5 = 14.4kF.
Fred Bloggs.
In article , snipped-for-privacy@home.co.uk mentioned...
It's not the same. A battery's voltage stays relatively constant, whereas the capacitor continually discharges, to zero. But you'd need lotsa farads. See
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My email address is whitelisted. *All* email sent to it goes directly to the trash unless you add NOSPAM in the Subject: line with other stuff. alondra101 hotmail.com Don't be ripped off by the big book dealers. Go to the URL that will give you a choice and save you money(up to half).
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You'll be glad you did! Just when you thought you had all this figured out, the gov't changed it:
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Ah, I did it for a guess at 100ma for a hour and got 400F, in other words BFC!
Chrsi
In article , snipped-for-privacy@home.co.uk mentioned...
Maybe not so big, physically.
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My email address is whitelisted. *All* email sent to it goes directly to the trash unless you add NOSPAM in the Subject: line with other stuff. alondra101 hotmail.com Don't be ripped off by the big book dealers. Go to the URL that will give you a choice and save you money(up to half).
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You'll be glad you did! Just when you thought you had all this figured out, the gov't changed it:
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Why don't you get one of those 5volt 1 farad caps. They are about the size of 4 quarters stacked up. We used to use them to keep the old DRAM energized without batteries. They would last months and months. I think the last one I bought was from
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in northern California... Good luck and take care, Ross
AA
words
wow, would be interesting to see what happens to the steel rule after shorting one of those out ;-)
chris
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