mechanical calculator

3D Printed Mechanical Calculator Gears Hand Crank Using Over 130 3D-Printed Parts, This Six-Digit Calculator Lets Gears and a Hand Crank Handle the Logic

A maker has built a calculator out of some 3D-Printed parts that can perform up to six-digit addition, subtraction, multiplication, and division that too without any complicated electronics. The machine is made from more than 130 custom designed parts and works entirely through gears, pins, levers, springs, and a hand crank. Its design is inspired by historic mechanical calculators, especially…