A small control box mounts an Arduino Uno, an LCD2004A display, and a KY-040 rotary encoder. Internally, the box features mounting points for all three boards and cutouts for a panel mount push button switch, a panel mount power switch, a panel mount 2.1 mm DC barrel jack, and 4 panel mount 3.5 mm headphone jacks (2 back, 2 front).
The author marked this model as their own original creation.