Print all three STL files. They could be printed completely using white plastic. Or change the material to black color after printing 1 mm of 'clock screen.STL' if you like it in such way, as i did it ...
We’ve seen a few H-bridge circuits around these parts before, and here’s another application. This time we have an Old Train ...
Having an enclosed 3D printer can make a huge difference when printing certain filaments that are prone to warping. It’s easy enough to build an enclosure to stick your own printer in, but ...