This is a replica of a rarely known historic calculating device. In fact, it is the very first machine, that did multiplications. A few decades before Leibnitz and Pascal.

My machine is open source hardware design, I want to make it as simple as possible to rebuild and repair the machine. It is meant to be in active use at exhibitions, fairs, schools, and museums. It is built from 3mm plywood. If things break, spare parts are available whereever a Lasercutter can be found (your nearest hackerspace, school, or fablab).

The source SVG files and some building instructions are found at https://github.com/jnweiger/Schickard

The design evolved slightly after the prototype shown in the photos. It still is somewhat a work in progress. I'll upload a full set of file to thingiverse, once the design is finalized.

The machine is already fully functional.

Please make sure to download all three files schickard_napier.svg, schickard_adder.svg and schickard_memory.svg all at the same time from github. Some components of the latest design are no longer compatible with versions from January 2019.