The wiring of the dual channel relay module to the LiPo power supply is the most sensitive part of this project. If any leads are connected wrong or the leads to the battery are connected to the ...

Looking for practical Arduino projects? This guide shows how to control a relay from your smartphone using an Arduino Uno — either via Bluetooth or Wi-Fi.

This article will explore the workings of a relay module and provide a detailed guide on how to interface a single channel relay module with an Arduino.

Refer to circuit_diagram.png in this repository for detailed wiring instructions. The circuit includes connections for the Arduino, ESP8266/ESP32, Bluetooth module, relay module, sensors, and LEDs.

Here, we are using a 4 relay module because we will only control four appliances. If you want to automate a different number of appliances, you can use a different relay module. There are many relay ...