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.

Arduino Uno - The World's Most ... Full Size. Small. Preview. Thumbnail. Image. Small. ... shield compatibility and 5 V power supply of the popular UNO R3, the UNO R4 adds a 32-bit microcontroller ...

In the press statement accompanying the launch, Massimo Banzi, co-founder and chairman at Arduino, said that the UNO R4 represents a new chapter to the UNO story, commenting, “With the ever-changing ...