casing made from an old drawer (stained and lacquered)
jack socket, banana sockets, potentiometers
wn transformers, wn wires from old TVs
magnetos from floppy drives sliders and an old timer
security holders
A irl510 was used. Instead of 5 coils, 10 were winded. The playing arc is about 2cm and with different tones 3cm. It's about 20-30kV of power.
Do not touch the electrodes! There was a small accident and it must be said that it hurts.
Placing materials between the electrodes can try the withstand breakdown voltage of it. The spark burns a 60-sheet notebook (tested).