The Arduino is a microcontroller board that you can program to read information from the world around you and to send commands to the outside world (inputs and outputs). The Arduino is a great tool to start into electronics and programming and it is used worldwide by makers, students, and even engineers. We have more than 300+ Free Arduino Tutorials and Projects: Get started with Arduino: Arduino Step-by-Step Projects. You’ll find all our Arduino Guides with easy-to-follow step-by-step instructions, circuit schematics, source code, images, and videos.