When I worked at Draper Labs we were building a 19" rack console related to the SABRE guidance system. I constructed a panel with a whole pile of LEDs and associated logic which illuminated them in a binary count - it would have taken some trillions of years for the last LED to illuminate. It was called the General's panel, referring to ranking military guests.To Complete One Rotation, This Machine Requires More Turns Than There Are Atoms in the Universe
Machines like blenders, washing machines, and even your car use reduction drives made of multiple gears to increase the torque or decrease the speed of rotation coming from a motor. Taking that idea to its extreme, Daniel De Bruin built a machine with 100 connected gears that turns so slowly on...gizmodo.com