If you ever wondered why my OC's cutie mark was a symbol with a lightning bolt inside, which you probably weren't, now you know :P

But anyway.  The circuit used is called a Zero Volt Switching (ZVS) flyback driver.  The circuit is rather simple. It's requires a custom center tapped primary to be wound around the flyback transformer of 4 - 6 turns.  A flyback transformer can be found in any CRT (fat) TVs and are what generate the electronic beam in the tube.