The Arduino Uno is a popular open-source microcontroller board based on the ATmega328P microchip. It is designed for beginners and professionals to build interactive electronic projects. The board features 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, and a reset button. With its easy-to-use interface and a supportive development environment (Arduino IDE), the Uno enables users to write code and upload it to the board through a USB cable.

What makes the Arduino Uno especially appealing is its versatility and vast community support. It’s commonly used in DIY electronics, robotics, home automation, and sensor-based projects. Thanks to its low cost and open-source nature, countless tutorials, libraries, and example codes are available, making it ideal for learning embedded systems, prototyping hardware, or even building complex IoT devices.