The 8-bit board with 54 digital pins, 16 analog inputs, and 4 serial ports.

ARDUINO MEGA 2560 REV3
Arduino Mega 2560 è una scheda elettronica basata sul microcontrollore Atmega2560. Dispone di 54 ingressi/uscite digitali

The 8-bit board with 54 digital pins, 16 analog inputs, and 4 serial ports.

A kit with all you need to learn how to solder by building your own Arduino UNO and wave synthesizer shield.

ARDUINO LEONARDO W/O HEADERS
The Arduino Leonardo is a microcontroller board based on the ATmega32u4 . It has 20 digital input/output pins