The Arduino Nano is a 0.73 inch x 1.7 inch (18.5 mm x 43.1 mm) board, similar to the Arduino Due. . . Features & Benefits of the Nano. • On-board ATmega328 microcontroller. • 14 I/O pins (6 PWM). • 8 Analog input pins. • 40 mA DC current per I/O pin. • 32