This will show you how to set up a power transformer driver which can be used to power flyback transformers and various other transformers. The driver is the speed controller out of a cordless drill.
Step 1: Collect all that you need.
You will need:
The speed controller out of a cordless drill.
A small neon indicator lamp or other gas tube.
A step up transformer. You can wind one yourself or use a flyback.
A battery. Mine is 7.2 volts