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Registered Member #1320
Joined: Sat Feb 16 2008, 01:31AM
Location:
Posts: 67
not a good idea (assuming your using it for a electromagnetic accelerator). with low voltage (12vdc) you will require huge amounts huge amounts of current to transfer the energy and thus will need ridiculously sized wire. Also they actually are not cost effective even those big 3 farad caps only contain 216 joules of energy.
Registered Member #1262
Joined: Fri Jan 25 2008, 05:22AM
Location: Maryland, USA
Posts: 451
Not to mention that pulse discharges kill supercapacitors. You should either order some caps or use photoflash caps at a good margin below their voltage rating.
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Andyman wrote ...
Also, with all that capacitance, it would take relatively forever to completely discharge, even if that is only 1/10 of a second.
Yea, i have a big blue capacitor and it is like 60,000uf and it would not work on a coil gun because it would shoot the projectile forward and then suck it back due to there being a charge after it moved forward.
Well a good place to get some VERY cheap capacitors is alltronics. These capacitors are only 7 bucks each, and for 2 capacitors my shipping price was like 6 bucks. They hold 312 joules each when fully charged. I bought two, they haven't arrived, but when they do i will let you know if they are quality.
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Capacitors for capacitor bank
