Like many nerds, I have a 3D printer (or two) sitting around that I picked up at the peak of the hobby's popularity. Surely, I'll use this thing all the time, I thought. I'd never again purchase ...

What do you do with an old 3D printer? They’re full of interesting components, after all, from switches and motors to lovely smooth rails. [Mukesh Sankhla] had a great idea—why not repurpose the ...