Specifications:
Microcontroller : ATmega2560
Operating Voltage : 5V
Input Voltage (recommended) : 7-12V
Input Voltage (limit) : 6-20V
Digital I/O Pins : 54 (of which 15 provide PWM output)
Analog Input Pins : 16
DC Current per I/O Pin : 20 mA
DC Current for 3.3V Pin : 50 mA
Flash Memory : 256 KB of which 8 KB used by bootloader
SRAM : 8 KB
EEPROM : 4 KB
Clock Speed : 16 MHz
LED BUILTIN : 13