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 For an extensive list of current, past or outdated boards see the Arduino index of boards.