Quantity   Component name
1 × Rotary Encoder EC11
1 × Adafruit Trinket M0 (also works with any 32u4 based board)
1 × Neopixel Ring 16
1 × Aluminium Knob 30x18mm - 6mm shaft https://www.audiophonics.fr/en/knobs-6mm/knob-notched-shaft-3018mm-o6mm-black-for-potentiometer-p-2601.html
1 × Aluminium case (re-purposed protective case for potentiometer) https://www.ebay.fr/itm/183537308155
1 × USB cable Electronic Components / Misc. Electronic Components