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General Misc => Robot Videos => Topic started by: Admin on December 22, 2010, 08:28:44 PM

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

Fun with ultracapacitors (http://www.youtube.com/watch?v=EoWMF3VkI6U#ws)
Title: Re: fun with ultra-capacitors
Post by: TrickyNekro on December 23, 2010, 05:17:12 AM
That's why they use them in welding machines :-p
Title: Re: fun with ultra-capacitors
Post by: macdad- 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)?
Title: Re: fun with ultra-capacitors
Post by: offencerobotics on January 04, 2011, 10:20:45 PM
very cool video!! Could used this I a battle bot maybe? call it "powerline"
Title: Re: fun with ultra-capacitors
Post by: 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.
Title: Re: fun with ultra-capacitors
Post by: blackbeard on January 14, 2011, 09:38:56 AM
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
Title: Re: fun with ultra-capacitors
Post by: Hawaii00000 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).
Title: Re: fun with ultra-capacitors
Post by: voyager2 on January 15, 2011, 12:18:28 AM
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
Title: Re: fun with ultra-capacitors
Post by: mrjameslat on January 24, 2011, 05:00:07 PM
I dare you to give that a good lick
-evil laugh-

haha nice video!
Title: Re: fun with ultra-capacitors
Post by: cronospark 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....
Title: Re: fun with ultra-capacitors
Post by: 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?
Title: Re: fun with ultra-capacitors
Post by: madsci1016 on July 05, 2011, 06:11:42 AM
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.
Title: Re: fun with ultra-capacitors
Post by: 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?
Title: Re: fun with ultra-capacitors
Post by: macdad- 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.
Title: Re: fun with ultra-capacitors
Post by: madsci1016 on July 05, 2011, 07:12:24 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.
Title: Re: fun with ultra-capacitors
Post by: corrado33 on July 05, 2011, 07:24:01 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