Here we are making a simple project with Arduino which uses three basic components that are IR Sensor, Relay Module and DC Motor. Here we will interface IR sensor with Arduino to control DC Motor.

Power on the receiver circuit next and wait for five seconds as defined in receiver code. Press pushbutton (S1 or S2) in transmitter circuit to control the corresponding relay in receiver circuit.

Smartphone-Controlled Arduino Projects: Use Bluetooth and Wi-Fi for Wireless Communication These two practical Arduino projects show you how to control a relay from a smartphone using an Arduino Uno ...

A simple Arduino project to work with Single & Dual Relay modules with ESP01 ESP8266 With Simple http page & ArduinoOTA support to upload code from Arduino IDE wirelessly - No need to remove from ...

Simply, it’s an Arduino library for communicating with Modbus slaves over RS232/485 via RTU (remote terminal unit) protocol. In conclusion, the Modbus 2-channel 5V relay module is a very useful device ...

In this water level indicator project, we have used arduino and ultrasonic sensor to know the water level in tank. A relay is used to start the water motor automatically when water level is low.