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Electromagnetic coil gun help with power(electric) source ?

How could I build a small coil gun with magnetic wire. I know how to make it just what could I use as a small but powerful powerful power source would a 9 volt battery work. 
Many other ideas?

A 9V battery would certainly not work.
planetroverrobo (author)  steveastrouk4 years ago
Why exactly what would I need to add to make it work
A MUCH bigger supply.