Resonant MOT Arcs

By adding capacitors in series with the MOT output, the system can be brought to resonance and the arc length is visibly increased. Usually, the best effects are achieved by adding 2-3μF capacitance, so I used three 1μF high-voltage capacitors harvested from old microwave ovens, connected in parallel (3μF).


Warning

MOTs are extremely dangerous transformers capable of outputing more than 2000VAC at a current that is lethal. Do not try to replicate anything you see, unless you know exactly what you are doing. Be sure to read disclaimer before proceeding.

Components

  • Microwave Oven Transformer (MOT)
  • 3x ~1μF capacitor