Arduino UNO R3 Development Board

Microcontroller ATmega328

•    Operating Voltage 5V
•    Input Voltage (recommended) 7-12V
•    Input Voltage (limits) 6-20V
•    Digital I/O Pins 14 (of which 6 provide PWM output)
•    Analog Input Pins 6
•    DC Current per I/O Pin 40 mA
•    DC Current for 3.3V Pin 50 mA
•    Flash Memory 32 KB (ATmega328) of which 0.5 KB used by bootloader
•    SRAM 2 KB (ATmega328)
•    EEPROM 1 KB (ATmega328)
•    Clock Speed 16 MHz
•    Length 68.6 mm
•    Width 53.4 mm