YouTube lunatic designed and 3D printed a working mechanical calculator

Mechanical calculators are precise, fascinating gadgets that you wouldn’t think would take well to being 3D printed, but a YouTuber has proved that a pocket-sized unit can be made purely from plastic filament. YouTuber 3D all Workshop detailed his working, but limited, build in a recent video. If you’re familiar with the holy grail of palm-sized mechanical calculators, the Curta, also known as the “pepper mill,” you already have a working understanding of how this 3D-prin