The video is a bit shorter today because I'm not at home and had to record multiple videos in a single week. But I hope you still like the mechansims :)
A racecourse somewhere in the UK, uses an analogue computer to calculate the odds. It uses a diagonal sliding bar, to perform some surprisingly complex maths.
I'm pretty sure it's impossible to build a 10-sided geneva drive using Lego, but maybe this: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-HHFvNfReZVs.html
