The Arduino Nano and Uno are equipped with very similar processors (the chip that essentially serves as the brain of the board). The Nano features an ATmega328, while the Uno sports an ATmega328P.

Hello, there, little guy. The new Arduino board's just been outed, and it's not kidding about the 'nano' part. The Arduino Nano 3 boasts an ATMEGA328, breadboard capabilities plus Mini USB support ...

Watch this video on YouTube. “The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.x).

But, there is one small stumbling block for those just looking to dip their toes in the ATmega-powered waters: you'll need to provide your own sensors, components and breadboard.

Like the Nano, the Micro's size and male pin headers make it perfect for prototyping with a breadboard. However, Arduino also offers this board without headers pre-soldered.