Controller ATmega328P

Input Voltage 3.35 -12 V (3.3V model) or 5 – 12 V (5V model)

Digital IO pins 14 (of which 6 provide PWM output)

Analog input pins 8

DC Current per I/O Pin 40 mA

EEPROM 512 bytes

SRAM 1 KB

Operating voltage 3.3V or 5V (depending on model)

Clock Speed 8 MHz (3.3V model) or 16 MHz (5V model)

Flash Memory 16 KB (of which 2 KB used by bootloader)