Old Computer Challenge 2026 Day 4 - Making a Case in FreeCAD

Since the coding part is now done, I decided to solder the Arduino and IR sensor on a bit of perfboard, and then put it in a case. I don't have a case though; but what I do have is a 3D printer, so I'm going to try my hands at designing one. This was interesting because I've never really designed anything before. I've always printed out models from Thingiverse or Printables, or if I needed something custom I kind of crudely put something together out of basic shapes in the slicer. Today I thought now is the time to do it right and get into actual CAD design, so I downloaded FreeCAD. And boy does this thing have a learning cure, let me tell you! This is definitely not going to be a tutorial, because I really have no idea what I was doing there. I just watched a few tutorials and then started clicking around, and in the end I think I ended up with something halfway decent, even though I'm not fully happy with it. But hey, first try. Anyway, here's the Arduino and the IR sensor, soldered…