How do i charge my coil gun capacitor?

I have a working coil gun, but i fried the circuit that charges my cap that i took out of a disposable camera. How can i make on of those myself? Does anyone know where i can find schematics on how to build a cap charging circuit that charges up to about 300v using AA or 9v batteries? The simpler the... show more I have a working coil gun, but i fried the circuit that charges my cap that i took out of a disposable camera.

How can i make on of those myself?

Does anyone know where i can find schematics on how to build a cap charging circuit that charges up to about 300v using AA or 9v batteries?

The simpler the better. In fact, assume i don't know anything about electronics.
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