VEX Robotics Ratchet Tutorial 

00:10 Introduction
0:38 Basic Components of a Ratchet
0:59 One-way vs two-way ratchets
2:24 Motorized Examples (running off the V5 Brain)
4:20 How to build a one-way ratchet
This video from our archive features Carter and Owen from 9181N going over the basics of ratchets. Owen explains the difference between one-way and two-way ratchets and Carter does a step-by-step build.