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What amperage will I get from these capacitors? Answered

Alright I am finally getting around to making a coil gun, I made a measly bank of 30 330v 100uf capacitors, totaling 3k uf. However, I just took apart a big ass power supply for battery banks, now I have two coke-can sized 250 volt capacitors, each rated 4400 uf, and I am going to hook them up in parallel, making it an 8200uf capacitor bank, to charge with camera flash circuits in parallel as well. Thing is, I need to find a relay that won't blow up from this, so what kind of amperage will I be getting sending this through a coil?


Well, that depends on what voltage you charge them with. The voltage you charge them with should be equivalent to the voltage you get out of them. So then it's a matter of finding the resistance and calculating the current.


5 years ago

I am also considering making a rail gun using these, the system to get the projectile moving would be kind of tricky but not too much, and I could use a manual valve. Finding rails and ball bearings or whatnot might be tricky around here though but who knows.