This has to be one of my favourite experiments. A Marx Generator. First described by Erwin Otto Marx in 1924, a Marx Generator is used to generate a high-voltage pulse. Marx generators are often used to simulate the effects of lightning on power line gear and aviation equipment. This uses a Cockcroft-Walton Voltage multiplier as the power source from the mains 230v AC. A Cockcroft–Walton generator, or multiplier is an electric circuit which generates a high voltage DC voltage from a low voltage AC or pulsing DC input (from a PWM, etc).