Calculator hacks are fun and educational and an awesome way to show-off how 1337 your skills are. [Marcus Wu] is a maker who likes 3D printing and his Jumbo Curta Mechanical Calculator is a project from a different era. For those who are unfamiliar with the Curta, it is a mechanical calculator that was the brainchild of Curt Herzstark of Austria from the 1930s.
The most interesting things about the design were the compactness and the complexity which baffled its first owners.The contraption has setting sliders for input digits on the side of the main cylindrical body. A crank at the top…
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