Genuine Arduino Uno Rev3

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The UNO is the best board to get started with electronics and coding. If this is your first experience tinkering with the platform, the UNO is the most robust board you can start playing with. The UNO is the most used and documented board of the whole Arduino family.


Arduino Uno is a microcontroller board based on the ATmega328P (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, 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.. You can tinker with your UNO without worrying too much about doing something wrong; in a worst case scenario you can replace the chip for a few dollars and start over again.

"Uno" means one in Italian and was chosen to mark the release of Arduino Software (IDE) 1.0. The Uno board and version 1.0 of Arduino Software (IDE) were the reference versions of Arduino, now evolved to newer releases. The Uno 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of USB Arduino boards, and the reference model for the Arduino platform; for an extensive list of current, past or outdated boards see the Arduino index of boards.


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
Length - 68.6 mm
Width - 53.4 mm
Weight - 25 g


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  • 5
    UNO R3

    Posted by Dan on Nov 4th 2019

    No problems and did not expect any with the real thing. Have not had problems with clones just like the original genuine part.

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