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Author Topic: fun with ultra-capacitors  (Read 2691 times)

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Offline AdminTopic starter

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fun with ultra-capacitors
« on: December 22, 2010, 08:28:44 PM »
Very useful if you want to calculate the energy within a capacitor . . .

Fun with ultracapacitors
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Offline TrickyNekro

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Re: fun with ultra-capacitors
« Reply #1 on: December 23, 2010, 05:17:12 AM »
That's why they use them in welding machines :-p
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Offline macdad-

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Re: fun with ultra-capacitors
« Reply #2 on: December 23, 2010, 10:32:10 PM »
Yeah! Big Firey Sparks!  8)

But could it be possible to reduce the ESR even more, possibly a temperature drop following the principal of superconductors(Of course not dropping them far below freezing)?
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Offline offencerobotics

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Re: fun with ultra-capacitors
« Reply #3 on: January 04, 2011, 10:20:45 PM »
very cool video!! Could used this I a battle bot maybe? call it "powerline"
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Offline madsci1016

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Re: fun with ultra-capacitors
« Reply #4 on: January 04, 2011, 11:37:14 PM »
Good find, I have to buy some of those for the Childrens Science show we're starting at work.
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Offline blackbeard

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Re: fun with ultra-capacitors
« Reply #5 on: January 14, 2011, 09:38:56 AM »
Quote from: madsci1016 on January 04, 2011, 11:37:14 PM
Good find, I have to buy some of those for the Childrens Science show we're starting at work.

wire them to 2 big copper electrodes with a sign saying "DON'T TOUCH!"

that ought to weed out the dumb ones
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Offline Hawaii00000

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Re: fun with ultra-capacitors
« Reply #6 on: January 14, 2011, 09:45:06 PM »
Sweet! I no longer need my multimeter to trace PCB leads. I just buy one of these and use it to light them up... or vaporizes them (either way).
« Last Edit: January 15, 2011, 01:34:29 AM by Hawaii00000 »
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Offline voyager2

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Re: fun with ultra-capacitors
« Reply #7 on: January 15, 2011, 12:18:28 AM »
Quote from: blackbeard on January 14, 2011, 09:38:56 AM
Quote from: madsci1016 on January 04, 2011, 11:37:14 PM
Good find, I have to buy some of those for the Childrens Science show we're starting at work.

wire them to 2 big copper electrodes with a sign saying "DON'T TOUCH!"

that ought to weed out the dumb ones
hehe
Great idea...
Cue Evil Laughter
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Offline mrjameslat

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Re: fun with ultra-capacitors
« Reply #8 on: January 24, 2011, 05:00:07 PM »
I dare you to give that a good lick
-evil laugh-

haha nice video!
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Offline cronospark

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Re: fun with ultra-capacitors
« Reply #9 on: February 25, 2011, 10:13:09 PM »
Haha, very nice video. I like the beaver remark. ;D And here I am scared of discharging small capacitors....
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Offline corrado33

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Re: fun with ultra-capacitors
« Reply #10 on: July 04, 2011, 08:09:56 PM »
If he had... oh I dunno, touched both ends of that with his hands, what would have happened?
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Offline madsci1016

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Re: fun with ultra-capacitors
« Reply #11 on: July 05, 2011, 06:11:42 AM »
Quote from: corrado33 on July 04, 2011, 08:09:56 PM
If he had... oh I dunno, touched both ends of that with his hands, what would have happened?

Nothing, it's only 2-10 Volts. Same as touching a 9V battery. The capacitors just have the capability to source more current.
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Offline corrado33

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Re: fun with ultra-capacitors
« Reply #12 on: July 05, 2011, 02:22:02 PM »
Then why the heck are we worried about discharging caps in power supplies?  They're probably only 12V right?  Maybe a bit more?
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Offline macdad-

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Re: fun with ultra-capacitors
« Reply #13 on: July 05, 2011, 05:20:34 PM »
The pure power their able to dump, they may be low voltage but can hold many Amps.
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Offline madsci1016

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Re: fun with ultra-capacitors
« Reply #14 on: July 05, 2011, 07:12:24 PM »
Quote from: corrado33 on July 05, 2011, 02:22:02 PM
Then why the heck are we worried about discharging caps in power supplies?  They're probably only 12V right?  Maybe a bit more?

No, caps in power supplies could be holding hundreds of volts on the high voltage side. That makes them dangerous.
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Offline corrado33

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Re: fun with ultra-capacitors
« Reply #15 on: July 05, 2011, 07:24:01 PM »
Quote from: madsci1016 on July 05, 2011, 07:12:24 PM
Quote from: corrado33 on July 05, 2011, 02:22:02 PM
Then why the heck are we worried about discharging caps in power supplies?  They're probably only 12V right?  Maybe a bit more?

No, caps in power supplies could be holding hundreds of volts on the high voltage side. That makes them dangerous.

Ah, I knew there was a wrench thrown into my logic.  I forgot that they have high voltage and low voltage sides.   :D
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