Every 5 or 10 PCBs I order from JLCPCB I get a 15 x 15 cm cardboard box. I have accumulated many now. They are quite sturdy and a shame to put into paper recycling after one use.

I think I now have a use for them. I cut a slightly slanting slot about 15° from the vertical from the top a few cm down the sides. Then I mounted quite recently designed boards from #Ancient 12 hour display there. The box is actually turned upside down and back to front, hence the discreet upside down logos on the front.

Here is the top view with the MCU module, although any MCU module will do. It's mounted outside because of the setting buttons. The power supply board is inside. It's supplied from a wall wart so low voltages.

I'll need to judiciously apply some hot glue to prevent joints and wires from going astray. Also to secure the clips at the middle top and bottom.

Another box. This is the clock from #Ancient 12 hour display 

This project was not sponsored by JLCPCB. But I still thank them for the boxes. 🤣