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Shop relay trigger
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YouTube
Circuit Digest
Arduino Relay Control: A Beginner's Guide to Controlling Machines
In this tutorial, we will be learning how to interface a single-channel relay with an Arduino so that you can control external devices such as a light or a fan at your home super easily. Circuit Diagram and Arduino Code: https://circuitdigest.com/microcontroller-projects/interface-single-channel-relay-module-with-arduino
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