A new project has transformed a humble Arduino Pro Micro into a joystick with various knobs. The project is intended to be used in conjunction with a keyboard for making adjustments when gaming or creating music.
https://www.notebookcheck.net/Transform-the-Arduino-Pro-Micro-into-an-Arduino-Keyboard-Joystick-Extender-Box-with-a-new-project.499119.0.html