Learn how to set up a 5V relay on the Arduino use sensors to control 120-240V appliances.
Arduino - Relay Arduino Tutorial
Driving a Relay With an Arduino : 9 Steps - Instructables
NodeMCU with 5V relay - General Electronics - Arduino Forum
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Driving a Relay With an Arduino : 9 Steps - Instructables
Driving a Relay With an Arduino : 9 Steps - Instructables
Relay control with Button - Arduino Tutorial
Arduino Controlled Relay Module, Home Automation
Lesson 52: Controlling DC Motor using two relays
Arduino Relay Basics - How It Works and How to Use It : 7 Steps - Instructables
How to Set Up a 5V Relay on the Arduino - Circuit Basics