This case keeps your buck converter safe, holds a USB plug, and provides magnetic contacts to attach homemade solar panels.
This case is part of a larger guide to make a converter for easy to make solar panels.
I printed with 0.2mm layer height. The model is so small that infill settings don't matter much. After printing, the case should be able to snap and stay together through some tricky designing.
Follow my instructables guide on making this converter.