Sometimes electrical theory can come across as confusing. These videos are simple and to the point. This series of dozens of easy-to-understand videos was created by Chad Flinn when he was a trades instructor at the British Columbia Institute of Technology in Vancouver, B.C., Canada.
Electrically Controlled Systems playlist by Jim Pytel, NSF ATE CREATE and Columbia Gorge Community College (50+ free online lectures on YouTube)
This playlist examines hard wired relay based ladder logic techniques used to start, stop, change direction and modify operating characteristics of actuators. The playlist explores ladder logic, contactors, relays, overloads, solenoid operated valves, switches, indicators, manual motor starters, 2 wire magnetic motor starters, 3 wire magnetic motor starters, jogging circuits, friction brakes, reversing magnetic motor starters, plugging circuits, reduced voltage starters, timers, and more. This playlist is a first in a series of three and is intended to be followed by the “Programmable Logic Controllers (PLCs)” and “Motor Drives” playlists.