This is a simple project using Arduino Leonardo, a potentiometer, and 10 LEDs to control computer (PC) volume using the HID-Project library and sending commands "MEDIA_VOLUME_UP" and "MEDIA_VOLUME_DOWN".

Please watch the full tutorial on Youtube for more details about the project. The WOKWI link opens the online simulation running in the browser. Please note that the WOKWI simulation uses Arduino UNO, and cannot control the volume from the browser.

You can use any color LEDs. For the resistor values, use whatever you feel looks the best. Usually, values between 220R to 1K work fine.

The download links include both the Gerber files as well as the source KiCad file. Feel free to modify the files to your needs, but please share your creations!

FULL TUTORIAL: https://youtu.be/6cqvTHCuDto

Online simulation: https://wokwi.com/projects/336418733226459730

Used components:

Arduino Leonardo - https://s.click.aliexpress.com/e/_DDhZNN9

Arduino breadboard prototyping shield - https://s.click.aliexpress.com/e/_ApbCwx

Huge Aluminium Knob: https://s.click.aliexpress.com/e/_A4GlET

Big Black knob: https://s.click.aliexpress.com/e/_Aq1wGF