In this video I'm going to show how interrupter modulation can change the shape / size of the tesla coil's arc and use an arduino to play music with square wave tones. The circuit is the same as in part 3, except I've reduced the number of turns on the primary coil from 4 to 2, and I'm providing a 30V input instead of 120V after having a few fireballs resulting from the mis-use of 120VAC.
In the musical portion of the video, i 3d print a keyboard that plays major notes from C2 to C3, and can trigger different musical routines from specific button combinations.
The songs are hand-written based on notes i played by ear with a browser-based tone generator, because I haven't figured out how to play MIDI files with the arduino yet. The tone generator can be found here:
https://www.szynalski.com/tone-generator/
The previous parts of this video can be found here:
Part 1: https://www.youtube.com/watch?v=CdUaW9StZwg&t=9s
Part 2: https://www.youtube.com/watch?v=U_dhVrOCprA
Part 3: https://www.youtube.com/watch?v=ncHoBamK9jA&t=818s