An Arduino pro micro project to control volume or mute the sound. You also use rgb to have a nice experience.

Regular Mode:

Animation-Modes:

What do you need:

1 x Arduino Pro Micro(USB-C) blue Version
8 x SK6812 LEDs(5050 Chip)
1 x ALPS Rotary Encoder with integrated Switch
1 x 10k Ohm Resistor
4x M3X16 srews
M3 threaded inserts
PCB
It will cost around €20 per Volume Knob. If you want to find more information, you can go to my GitHub page.

3D Printing:

You can print all the parts from PLA besides the transfuser that should be transparent. (Optional) use the special feature to edit the bottom pattern. I liked the Octagram Spiral that

Assembly:

3D print all necessary parts 

Next, use a soldering iron to melt the threaded inserts into the top at the marked places.

Assemble the PCB → First the SMD LEDs, after that the resistor. The next step is a little bit tricky, remove the little feet from the rotary encoder and solder the 5 pins to the PCB. The last step is to solder the Arduino Micro to the PCB.

Software:
You have a limited amount of control. The software is arranged in a system like on the picture.

You have the selection of 25 different colors and 5 different animation modes to choose from. 

Program the Arduino with the Arduino IDE