Mechanical programming

While not focused on how to build devices, these videos show how calculations and logic circuits can be made from purely mechanical parts. In this demonstration, Matt Parker from standupmaths and Numberphile, uses dominoes, but this technique could easily be transferred to levers, cogs and many other mechanical pieces. While electronics does make for a much faster, smaller and easier calculator/computer, we still find this mechanical way of making a processing unit very fascinating and it might fascinate you too, if you are as much a fan of mechanics as we are.