Recommended
Slayer Exciter Circuit, Using a Tesla Coil
Why people recommend it
An entertaining demonstration of a simple Tesla coil driver, linked to show wireless power transfer and its limits whenever the slayer exciter circuit comes up.
Watch for: entertainment first, theory second
In their words
See [video] for an entertaining demonstration.
WhatRoughBeast on electronics.stackexchange.com, Jan 2016. CC BY-SA.