The setup() function is called once at the beginning to set the LED pin as an output. The loop() function contains the main logic and is executed repeatedly. Usage: Connect the positive leg (longer ...

This project demonstrates how to connect and control an external LED using an Arduino Uno. It’s a simple and fundamental project that introduces the basics of digital output. In this project, an ...

ARDUINO UNO is an ATMEGA controller based board designed for electronic engineers and hobbyists. Arduino based program development environment is an easy way to write the program when compared to ...

The bare LED matrix has 16 pin outs with 8 common positive and another 8 common negative. For connecting this matrix directly to a UNO, we need to spare 16 pins on the UNO. With the output pins low on ...

In our case Arduino UNO has 2 external interrupts: on pin 2 with ID 0 and on pin 3 with ID 1. So the first parameter is the ID of the interrupt, the second one is a function we call (in our case count ...

After making the connections as shown in Fig. 5, upload the source code to Arduino Uno board. Connect Arduino board to 5V DC source through its USB cable by connecting to your PC/laptop. Then connect ...

Here is ‘blink’ modified to work TXLED and RXLED as well as LED-BUILTIN. int RXLED = 17; // The RX LED has a defined Arduino pin int TXLED = 30; // The TX LED has a defined Arduino pin // the setup ...