Fun with ultracapacitors
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2. HellsVacancy commented 12 years ago
"Wow, that beaver really took a pounding" awesome
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3. banzemanga commented 12 years ago
Heck! I am so going to try this experiment!
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4. N3R3Z commented 12 years ago
#1 I'll go with A)... If i take example from vid: Voltage of that capacitor is 2.5V with internal resistance of 0,0007Ohm. If you connect those two wires together you'll make short circuit. So the current trough the capacitor will be I=U/R ... I=2.5/0.0007 which is about 3571A (and that's really A LOT). You can leave out resistance of those wire (it's really small in case of usual copper wire) you can count Power -> P=(I^2)*R=(3571^2)*0,0007 = 8926 J = 8,9kJ... and because the wire is much thinner and smaller than capacitor, it will vaporize much quickly than capacitor
But if you replace that small wire with something much thicker, maybe the capacitor would melt or maybe even explode
That's all just my opinion, so it shouldn't be necessarily true
But if you replace that small wire with something much thicker, maybe the capacitor would melt or maybe even explode
That's all just my opinion, so it shouldn't be necessarily true
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6. sartre commented 12 years ago
Be careful here folks. I had a PC years ago which was badly designed. If you unplugged it and held the plug you got a shock from the capacitors. Even though they were the less powerful types mentioned in this video, they were big enough to deliver a vicious shock. These ultracapacitors can kill.
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8. cameramaster commented 12 years ago
Imagine using those Ultra's to build a Taser.....Mind you ....You'd need a back pack to carry the circuitry ..Hmm.....maybe not such a good idea after all :-(
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10. h8isgr8 commented 12 years ago
These type of capacitors still have a relatively high internal resistance when compared to standard capacitors. If you put a few in series to get a higher voltage it just compounds the issue.
Only good for moderate current draw.
Oh, and just for comparison.... a car battery can deliver roughly 2MJ (Mega Joules) of energy without dropping below 10.5V. That just shows how pathetic these caps really are.
Only good for moderate current draw.
Oh, and just for comparison.... a car battery can deliver roughly 2MJ (Mega Joules) of energy without dropping below 10.5V. That just shows how pathetic these caps really are.
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11. loadrunner commented 12 years ago
1.21 Gigawatts
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15. loadrunner commented 12 years ago
They store power very slow, but can release it very fast. I think it can be used in weapons.
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17. ataneg commented 12 years ago
Probably one day we will start seeing these in KERS for cars... Now they are too week and expensive even for that. No comment for battery replacement
They can jump into our gadgets sooner, but...(this 6 capacitor array holds about the same power as a 3.6V 750mAh battery) apparently this array costs at least $500 compared to $5 for a LiIon battery, its a bit heavier and a lot more dangerous...
the benefits though are pretty quick charging and no limit in the number of charges.
They can jump into our gadgets sooner, but...(this 6 capacitor array holds about the same power as a 3.6V 750mAh battery) apparently this array costs at least $500 compared to $5 for a LiIon battery, its a bit heavier and a lot more dangerous...
the benefits though are pretty quick charging and no limit in the number of charges.
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18. rufinus commented 12 years ago
this is used in cars today :-) but only to back up amps. see http://www.sonicelectronix.com/cat_i6_capacitors.html for examples and explanation.
+4 1. Cloe commented 12 years ago