I took the inspiration from daggr for the design. I could've just used his, but I wanted to try and design it myself.

The original idea however is from github ,
there you can find the code and a more detailed instruction

The parts I used:

• five 10k ohm potentiometers
• an arduino nano
• some cables and soldering tools

To make the print with 2 colors with a single extruder/filament printer I aligned the different STLs in my slicer and then exported them separately. Then I printed the black parts first and then switch filament to white and that way I got 2 color prints. This way it doesn't stick out.
(Learned this technique from make anything )

If you want a top without icons or make some icons yourself I added it without the icons.

You could also buy some knobs instead of printing them if you don't like this look.