An electrical relay is a switch that operates automatically with the help of control signals. To Know more about relays read this article.

This article is a basic IOT based home automation project to control ceiling light using NodeMCU, Amazon Web Service tool, and relay module.

Home Automation - A method of using Electrical resources efficiently

In this article, we will check out the various steps and precautions to keep in mind, while working with relay modules. 4 Channel Relay...