Design based on the Minecraft mod "Applied Energistics 2"
https://www.curseforge.com/minecraft/mc-mods/applied-energistics-2
Artistic credit goes to the team behind the mod.

Print instructions:
The STL file uses inches for units, but the 3MF files should have units attached.
Print 5 of the "single-face" parts, and glue them together at the corners.
Print the body lid. It slides into the cube made by the 5 face plates.
Then install any desired electronics and press the base part on.

The base is designed to fit an Arduino Nano. It isn't a perfect fit, so a bit of clipping may be needed near the opening for the Mini USB connector.