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I would be willing to reship them, I want to buy some caps too.
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Holy $#!% Ultra-Capacitor
- Thread starter Wolfman29
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I would be willing to reship them, I want to buy some caps too.
Benm
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Well.. lets add a boost converter to these and power lasers with them 
The energy density is not that great, but they would have some advantages over lithium cells: extremely abuse proof and rechargable for many cycles. No problem of draining them below a safe voltage, and charging can be limited by simple voltage regulation that doesnt need to be -that- exact... just 2.3-2.5 volts would be fine.
The energy density is not that great, but they would have some advantages over lithium cells: extremely abuse proof and rechargable for many cycles. No problem of draining them below a safe voltage, and charging can be limited by simple voltage regulation that doesnt need to be -that- exact... just 2.3-2.5 volts would be fine.
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I charged them by just directly hooking up my 3A 18V PSU to them. Of course, I set the voltage to around 2.5V so that it wouldn't overcharge and asplode. And no, I didn't shock myself - that thing is frakkin' scary! It cut into the aluminum bar I was shorting it with (well, sparking with, anyway).
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No idea. Its a GE 4KV cap. Unfortunately its full of PCBs. :cryyy:
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Yeah! You don't want to go around messing with 8kJ of readily dischargeable energy
Benm
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Those high voltage caps are different beasts.. they are used as buffer caps in hv circuits, but also as phase rotator/compensation in medium voltage circuits. Units that size are quite hazardous though - when fully charge they will still give you the jolt from hell despite being not-super capacitors.
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To be honest I bought it for the ceramic electrodes. But I'm not going to dump a half gallon of PCB juice in the ground. I'll find a use for it sooner or later.
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Careful, that's a slippery slope ;-)
Fiddy
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i gots a 415V cap from work and charge it up with a megger (insulation tester) at 500VDC, that thing is pretty deadly at full power.
vk2fro
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I have 10 450V 2400uF caps I am wiring up in a series parallel string for 900V at 12mF (yes I am getting my uF's and mF's right here).
Should be pretty darn deadly, and destroy things quite well.
Trigger is a 10,000 amp peak SCR. See the "big capacitor bank thread".
Should be pretty darn deadly, and destroy things quite well.
Trigger is a 10,000 amp peak SCR. See the "big capacitor bank thread".
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Can and will blow off fingers, break bones and cause fairly instant defib.
Microwave oven caps 2.5Kv @ 3uF in big old Toshiba radar range ovens used to carry enough energy even when unplugged to blow the end off a screw driver when they were not properly discharged. These caps were mostly paper/styrene oil filled.
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Well I gave in and bought five. Even if they go down in price (in a few years), $10 for a 2600 F Ultracap is just insane, and I'll be able to use these for all kinds of things.
I remember seeing some powerline capacitors, 40kV range, for sale once. They had to remain shorted otherwise the charge they'd acquire by just sitting in the air could kill you by accident. Nice little doorbell booby trap.
I remember seeing some powerline capacitors, 40kV range, for sale once. They had to remain shorted otherwise the charge they'd acquire by just sitting in the air could kill you by accident. Nice little doorbell booby trap.
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Holy shizah! How do you acquire a charge by just sitting there?!
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Nice to know I wasn't the only one.
I gave in also and bought two of them last week.
Make that 4. bought 2 more tonight
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If you buy more than $50 worth, remember to add the coupon they have on their site for $5 off. There's another too for $10 off for $80 or more.
