He built himself a Tesla coil, and a table with hidden AC electromagnets in it that would make a metal plate float in the air.
In some cases the two circuits of the Tesla coil, the primary and secondary, are sections of one single coil.
One electrode was safely grounded, the other connected to a Tesla coil.
|tesla coil |
An electrical device that generates extremely high voltages, usually for the purpose of creating dramatic electric arcs and lightning effects or for producing x-rays. Tesla coils use step-up transformers to boost the voltage of a power supply and build up large charges in a capacitor. A spark gap periodically shorts out the capacitor, releasing its charge in huge current flows, that generate extremely high voltages (up to ten million volts) through an open-air transformer.