Arduino Uno R3

Specification:

• 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