C'est l'été ! 
Lévitation acccoustique
inspirations
- https://create.arduino.cc/projecthub/Ingeimaks/ultrasonic-levitation-with-arduino-uno-a901f0
- https://www.heise.de/make/artikel/Einfacher-Ultraschall-Levitationsapparat-4022505.html
- https://www.instructables.com/Ultrasonic-Leviation/
- https://www.hackster.io/e_s_c/ultrasonic-levitation-machine-using-arduino-9e3989
- https://www.hackster.io/Asimov/acoustic-levitation-6954bd
