Why are we turning?

To build your bot, you’ll need some bits. Today we talk about wheels pulleys and gears—where and when they happen, and how and why to use them.

Here are a couple of sites on the wheel.

A Salute to the Wheel

Who Invented the Wheel? And How Did They Do It?

Here’s a link or two on pulleys.

Pulley,Pulley inventors

Pulleys: Did You Know?

Here are two videos on Hero’s automatic temple doors.

Ancient Roman Automatic Doors - Over 2000 Years Old!

Hero's Temple Door Functional Model

And some stuff about gears.

Antikythera mechanism

Gears 101: The Fascinating Evolution of the Gear for “Gearheads”