Another cool one is this guy's crazy-detailed explanation of mechanical watch mechanisms with interactive diagrams using hand-written WebGL: https://ciechanow.ski/mechanical-watch/
If you'd like to read a comprehensive blog post about the intricate mechanisms that make a mechanical watch work, with amazing interactive visualizations, I recommend reading this blog post[1] by Bartosz Ciechanowski, a person famous on HN for his high quality blog posts that explain things comprehensively, with nice visualizations. (the #1 top post on HN right now is his new blog post about the moon [2]).
Oh! Look, a well-researched, deeply-explained, and interactive post.
Honestly, when I initially read the domain name and noticed the TLD is ".ski" I was thinking it is from the author who wrote about Mecanical Watch [1] and other cool stuff.. it turned out to be a totally different one but of similar quality. What's the secret sauce behind this ".ski" TLD :)
A don't-miss interactive visualization, and a tour de force of hand-written JavaScript and WebGL:
https://ciechanow.ski/mechanical-watch/
Previous discussion, thanks to todsacerdoti: https://news.ycombinator.com/item?id=31261533