#define LED_BUILTIN 13. This indicates digital pin 13 on the Arduino's pins connector (also called a header). But at the same time LED_BUILTIN tells the Arduino to use the actual built-in LED on ...

8×8 LED Matrix modules are now widely available, and fortunately they are easy to use with our favorite Arduino microcontroller. 8×8 LED Matrix module have many applications in real life, such as ...

This Arduino-based Pomodoro timer project also uses this 25-minute cycle. Once you push the button to start the timer, it will run for 25 minutes, display a count-up timer and a "Study time ...

WifiDuino has been designed to offer users an open-source Arduino-compatible, wifi-enabled board. Enabling makers and developers to use Arduino IDE (Integrated Development Environment) interface ...

Solder the three-pin plug to the Arduino. Three-pin plugs come in a set of two short cables—one with a female end, and another with a male end. Which one you use will depend on what type of end ...