The Pascaline (Mechanical Calculator)

The Pascaline is a mechanical calculator built by the French scientist and philosopher Blaise Pascal in 1642 (first “public release” in 1645). He wanted to help reduce his father workload during his daily tasks as a tax commissioner. The complexity of the device and the production cost prevented it from being sold to the public, but it inspired many later calculators over the next centuries.

Sources: https://en.wikipedia.org/wiki/Pascal%27s_calculator

 

Disclaimer : this set has been built only in Bricklink stud.io not physically. Therefore, it has not been tested and I can’t affirm this mechanism works the way it should. However, my goal, when designing it, was to create a prototype that would be both as close as possible to the original device, and to follow the rules of this challenge (I kept it under 1000 parts, there are actually precisely 996).

 

Here is a video (not made by me), that explains the way it works:

Hope you enjoy it !