The Arduino Nano is a compact, powerful, and breadboard-friendly microcontroller board built around the ATmega328 (Arduino Nano 3.x). Despite its small size, it delivers the same performance and features as the Arduino Duemilanove, all in a sleek, space-saving design. Perfect for prototyping and embedded projects, the Nano connects easily via a Mini-B USB cable and eliminates the need for a bulky DC power jack — making it the ideal choice for makers, students, and developers who value efficiency and versatility.