Arduino Uno and 4 Relay Module are connected. If we have those connections, we need to set the Relay Module's pins as: module[1].setPinNumber(5).setPinMode(OUTPUT); 1st relay (IN1) is connected to the ...

By using an Arduino Uno and a single-channel relay module, you can control high-voltage or high-power devices, such as lights, motors, and appliances, from your computer or mobile device. In this blog ...

The +5V supply line (VCC) of the module is linked to the 5V line of the Arduino. GND of the module is the common (0V) connection. ... Here the addition of 2N3906 transistor controls an ...

Download "sms_call_gate.ino" Sketch from the repository and Upload it to Arduino. NOTE : Make sure to replace your number in code at line number 71. The number must be in international format. After ...

I checked several Arduino projects and related libraries available online but was confused. Finally, I decided to do my first test with the help of a Windows 10 computer as the host. First, I ...

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 ...