Microcontroller: ATmega328

Operating voltage: 5V

Power supply voltage (recommended): 7-12V

Maximum power supply voltage (not recommended): 20V

Digital I / O pins: 14 (6 of which provide PWM output)

Analog input pins: 6

I / O pins current (5V): 40mA

I / O pins current (3.3V): 50mA

Flash memory: 32KB (ATmega328) of which 0.5 KB is used for bootloader

SRAM: 2KB (ATmega328)

EEPROM: 1KB (ATmega328)

Operating clock: 16MHz