7B35.95 - Audio Modulation of a Plasma Arc
To demonstrate that you can manipulate a plasma by changing the input, in this case with an audio input.
Attach the mp3 player to the pre-amp. The pre-amp is then connected to the modulating power supply of the Plasma Arc. The leads of the power supply run to a pair of electrodes encased in a pvc tube. Make sure the volume of the mp3 player and pre-amp is set to full power. Once the arc has formed, adjust the volume as necessary to get a nice output signal.
Turn on the mp3 player to a given song and make sure the volume of the player and pre-amp are all the way up. Make sure the switch on the power supply is turned on. You should see an arc form between the electrodes encased in the tube. Adjust the volume of the music once the arc has formed to get the best output signal. The arc forms the shape due to the chimney effect since the plasma is hot and hot air rises, it pulls cooler air in from the bottom of the tube.
If you disturb the arc by blowing on it, it disturbs the audio that is emitted by this modulated arc.