A housing designed to hold a 120mmX120mmX2.5mm lithopane, and shine a light behind it. It was designed for use with lithopanes generated in Cura. Place three strips of 2 segments of LED tape like this product: https://www.amazon.com/gp/product/B00HSF65MC in the back of the housing and attach a switch and power supply. The switch holes are sized to fit this switch: https://www.amazon.com/gp/product/B00CQNQN4Q but the size and hole placement seems to be somewhat standardized. Use #2 x 1/4in self tapping pan head screws to affix the switch. The larger hole is for a barrel jack to terminal hole adaptor. Use one that fits the hole and the barrel jack on your power supply (also check that the voltage is appropriate for the LED strip you are using and the current rating is high enough). I affixed it in with hot glue but other methods may also work. Print with the back (largest face) down and with normal (not tree) supports with top and bottom support interface. There will be supports in the little notch that you can clear out with a screwdriver. Print in a dark filament to avoid light leakage
Modeled in Autodesk Inventor (file attached)
Licensed CC4 BY SA