Original Arduino UNO R3

Official Arduino Uno R3 Made in Italy

Model Type	Arduino Uno R3
Microcontroller Chip	ATmega328P
Operating Voltage	5 V
Input Voltage(Recommended)	7-12 V
Analog I/O Pins	6
Digital I/O Pins	14 (of which 6 provide PWM output)
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
Operating Temperature (°C)	-10 °C to 60 °C

This Arduino UNO R3 is the original Arduino microcontroller board from Arduino Officials, based on Atmega328P. It has almost everything needed to support a microcontroller. Just simply connect it to a computer and power it via AC-to-DC adapter or use a battery to get started. In worst-case scenarios, when something wrong happens with the microcontroller, simply change the chip and you are to get started again.

The Original Arduino Uno Rev3 board is the first in a series of USB Arduino boards and the reference model for the Arduino platform. For an extensive list of current, past or outdated boards see the Arduino index of boards.