“A Tesla coil is an electrical resonant transformer circuit designed by inventor Nikola Tesla in 1891. It is used to produce high-voltage, low-current, high frequency alternating-current electricity.
The source of the audio signal in this case is the Arduino nano microcontroller. For this purpose, a simple codes are presented that generates a certain melody at output 9 of the microcontroller. This signal is now fed to the input of the modulator and next to the Cathode of the Vacuum Tube.”