In part 1 of the Mini Museum display case project I 3D printed and prepared the components for the Mini Museum display case. In part 2 I soldered the electronics that control the LED strips and the ultrasonic sensor. In this final article I will do the final assembly and mounting of the display case.

Below I have described the the final assembly of the Mini Museum display case, as well as the materials and tools that are required for the steps in this article.


  • A sheet of white A4 paper
  • Screws or double sided tape (for the wall mount)


  • Box cutter or scissors
  • Ruler


A hand holding a box cutter cutting a piece of A4 paper along a ruler.
A 137 mm x 119 mm paper insert for the back panel needs to be cut out of a white piece of A4 paper. This insert will have two functions. The first is to reflect some of the light emitted by the LEDs back into the Mini Museum. The second function is to create a white background that allows the black lettering of the Mini Museum to be read.
Top view of a 3D printed component of a Mini Museum, with a piece of A4 paper inserted in it.
The insert should fit exactly in the raised ridge of the back component of the display case. I designed the ridge so that when the front and back of the display case are bolted together the ridge forms a seal that prevents light from bleeding through any gaps.
Top view of a hand holding a Mini Museum above a desk.
Time to put everything together. I recommend wiping down the Mini Museum at this point. Any smudges or greasy fingerprints will show when lit up.
Two hands placing a Mini Museum into a black 3D printed display case.
Slowly drop the Mini Museum into the front of the display case. Be careful not to smudge it.
Two black 3D printed components of a Mini Museum display case, with a Mini Museum inserted in one of the components.
Place the back of the display case onto the front, fitting the ridge on the back into the groove of the front.
A hand holding an allen key that is used to tighten a bolt in a 3D printed black component.
Close the assembly by bolting the components together using the four M3x16 bolts.
A black 3D printed component covered in double sided tape.
When using the wall mount instead of screws double sided tape needs to be applied to the back of the wall mount. I probably used more tape than necessary, but better safe than sorry.
A black 3D printed component attached to a white wall with under it a piece of blue painters tape.
Mark the location on the wall where the Mini Museum will hang and peel off the backing of the double sided tape to attach the wall mount.
A Mini Museum illuminated by LED lights and displayed in a display case hung on a wall.
The final result. The light draws attention to the museum and brings out the small details in the specimens.

The motion sensor in action.


The display case works very well. The lit up Mini Museum is a great piece to spruce up an otherwise empty wall. It gets positive reactions from guests and I often find myself stopping in front of the Mini Museum when walking by.

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