How the Geneva Drive (the mechanical step that makes the second hand on a clock work by turning constant rotation into intermittent motion) works.

Oh snap!

As an engineer, this makes me happy.

If only one loop of this gif were equal to one second…

easy peasy

watching this while listening to a clock ticking is the best decision i have ever made

Man this is rather fascinating.

gearlike devices that are fascinating in their bullshittery are many and sundry

God I love moving things