It's a mosfet driving a LC tank circuit inside and has the antenna attached to that. More closer to a radio transmitter or induction cooker than an actual tesla coil.
Wont work on a slot machine, but it will cause those barnacle boots to let go, presss the button that prompts to enter the code then put the antenna over the display and hit the button. It will release ❤
what did you show that you can make a light turn on and off . stop scaming people telling them it works on slot machines it does no thing , why dont you go take a video of the slot machine you say it works on ..
i made my on emp... and realy it doesn't work on poker machines ...or any other machine i think maybe they ar incase in a metal casing....u cann just play on lights with it...electromagnetic shielding on all electronics so i think this toy is fu ussles as hell