In this blog, we will explore how a relay works, how to interface a single-channel relay with an Arduino Uno, and demonstrate a simple example of how to use the 5v relay module to control a lamp.

The relay module will need 5V from Arduino to power up and will get input from four different digital pins of the Arduino. Now let’s connect the relay module to your home appliance. Take the positive ...

This project uses GSM Module (SIM900) with Arduino to switch Relay state by SMS OR CALL. Step 1 (Connect SIM900 With Arduino) Use picture as a reference for connecting SIM900 to Arduino.

Tip: learn how to power light bulbs using Arduino with a relay module. What You’ll Need. If you’re ready to get started, you’ll need these items to get this project off the ground. Hardware. HW-479 ...

Connect the Buzzer to the Relay Module: Connect one end of the buzzer to NO (Normally Open) and the other end to COM (Common) on the Relay Module. Upload the Code: Open the Arduino IDE and create a ...