Recommended · for beginners
Control High Voltage Devices – Arduino Relay Tutorial
Why people recommend it
How To Mechatronics explains how to control a relay module from an Arduino, offered to people switching mains loads, though one commenter later preferred another resource.
Watch for: Mains voltage is involved, so take safety seriously
In their words
Quick link: [video] He uses a cheap 2-channel but a 8-channel should work.
Dat Ha on arduino.stackexchange.com, Oct 2016. CC BY-SA.
