Arduino UNO R3

Microcontroller:    ATmega328P

Operating Voltage    5V

Input Voltage (recommended):  7-12V

Input Voltage (limit):  6-20V

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

PWM Digital I/O Pins:  6

Analog Input Pins:  6

DC Current per I/O Pin:   20 mA

DC Current for 3.3V Pin:    50 mA

Flash Memory:    32 KB (ATmega328P) of which 0.5 KB used by bootloader

SRAM:    2 KB (ATmega328P)

EEPROM:  1 KB (ATmega328P)

Clock Speed:  16 MHz

LED_BUILTIN:  13

Length:   68.6 mm

Width:    53.4 mm

Weight:    25 g