At 04:26 PM 2/12/2012, you wrote:
>Here's an interesting video I found that shows a guy shorting 2600F
>ultracapacitors in different ways.
>
>A few questions:
>
>1. I know that these things have extremely low ESR and can therefore
>deliver an enormous power output. Considering that one has normal skin (no=
t
>too dry, not wet), how dangerous is one of those capacitors charged to 2.5=
V?

No shock danger whatsoever. Danger of permanent eye damage, perhaps hearing
damage, or burns from sudden release of energy (for example, into a shortin=
g
wire). You should at least wear proper eye protection when working with suc=
h
a device.

>2. Approximately at what voltage does it start becoming dangerous?

For shock? More than thirty something to fifty something volts, approximate=
ly,
but see above.

It could be useful for making a small spot welder.

>3. Anyone know of a cheap source to buy these things?
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