How I built a Mechanical Calculator
10:23
The Mechanical Integrator - a machine that does calculus
18:24
This Rare Futuristic eBike is a Total Nightmare
17:49
The Insane Engineering of the Gameboy
11:04
Manky old calculators.
30:09
I made a precision gearbox - with NO GEARS.
13:13
The Curta Calculator: A Mechanical Marvel Explained | Part 1
22:42
J'ai construit une horloge à tour
16:27