In this arduino relay control tutorial we will simply learn How to interface a Relay with Arduino. Here we are not using any Relay Driver IC like ULN2003 and will only use an NPN transistor to control ...

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.

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.

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 ...

Usage Connect the ESP32 to the relay module and the light source as described in the Wiring section. Upload the Arduino code to the ESP32 using the Arduino IDE. Observe the light source as it displays ...