This one is a complete rework but it follows the same concepts. The new shock circuitry is from a bug zapper in the shape of a fly swatter. We’ve seen these handheld devices before and dismissed ...

Cheap? [Jay Bowles]’ Tesla coil is based on a handheld bug zapper that you can find for a couple of bucks, or borrow from the top of the fridge in the relatively bug-free winter months.