Arduino Uno R3 Microcontroller

      Arduino Uno R3 Microcontroller

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      Warranty Plus:
      Your product will be replaced (including free shipping) with a new one within 12 months of purchase, even if it is damaged due to improper wiring, incorrect usage, a problem in the electrical installation or any other circumstance.

      Standard Warranty:
      12 month warranty comes with every purchase. Covers malfunctions when it is used within the described conditions/limits.


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      The Arduino Uno Rev3 SMD is a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator (CSTCE16M0V53-R0), a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.

      The Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip.

      Additional features coming with the R3 version are:

      • ATmega16U2 instead 8U2 as USB-to-Serial converter.
      • 1.0 pinout: added SDA and SCL pins for TWI communication placed near to the AREF pin and two other new pins placed near to the RESET pin, the IOREF that allow the shields to adapt to the voltage provided from the board and the second one is a not connected pin, that is reserved for future purposes.
      • stronger RESET circuit.

      "Uno" means "One" in Italian and is named to mark the upcoming release of Arduino 1.0. The Uno and version 1.0 will be the reference versions of Arduino, moving forward. The Uno is the latest in a series of USB Arduino boards, and the reference model for the Arduino platform.


        We do not support micro-controller programming. If you require help, please contact Arduino 

        Microcontroller ATmega328
        Operating Voltage 5V
        Input Voltage (recommended) 7-12V
        Input Voltage (limit) 6-20V
        Digital I/O Pins 14
        PWM Digital I/O Pins 6
        Analog Input Pins 6
        DC Current per I/O Pin 40 mA
        DC Current for 3.3V Pin 50 mA
        Flash Memory 32 KB
        Flash Memory for Bootloader 0.5 KB
        SRAM 2 KB
        EEPROM 1 KB
        Clock Speed 16 MHz
        Length 68.6 mm
        Width 53.4 mm
        Weight 0.98 oz
        Pin Mapping


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