Arduino Uno R3

  • Arduino UNO R3 board
  • Announced December 2nd, 2011
  • Includes new pin configuration (SCL, SDA, IOREF)
  • ATmega328P
  • Original board made in Italy (NKC Electronics)

Microcontroller ATmega328
Operating Voltage 5V
Input Voltage (recommended) 7-12V
Input Voltage (limits) 6-20V
Digital I/O Pins 14 (of which 6 provide PWM output)
Analog Input Pins 6
DC Current per I/O Pin 40 mA
DC Current for 3.3V Pin 50 mA
Flash Memory 32 KB (ATmega328) of which 0.5 KB used by bootloader
SRAM 2 KB (ATmega328)
EEPROM 1 KB (ATmega328)
Clock Speed 16 MHz

List Price: $ 15.10


2 Responses to “Arduino Uno R3”

  • glitchscience says:
    31 of 34 people found the following review helpful
    5.0 out of 5 stars
    Genuine Arduino R3. Made in Italy., January 24, 2012
    glitchscience (OHIO) –

    Amazon Verified Purchase(What’s this?)
    This review is from: Arduino Uno R3 (Personal Computers)

    This is the best price I could find for an Authentic Arduino R3 on the web.
    Plus Free Super Saver Shipping through Amazon makes it an even better deal.

    It is a genuine Arduino R3 Made in Italy.
    Appears to be a high quality build. Soldering looks perfect.
    Screen print on the board identifying I/O connections is excellent and easy to read.
    For that matter all of the screen printing looks great.
    Latest version. Uses the ATMEGA328P.
    Tested and works just as it should!

    Comes packaged in a colorful little box. Includes small folded booklet with statements regarding manufacturing, testing, packaging & environmental impact, certificate of origin, warranty information, etc..
    Also includes 6 open source and arduino round logo stickers.

    What more can be said? It is open source and there are tons of projects that can be found online
    With lots of information detailing how to put the projects together.
    My opinion is it is one of the best platforms to learn on and great for all skill levels really.
    Overall great purchase. Open source is the way to go.

    Update: The Arduino Uno R3 I reviewed was purchased through Amazon from the seller NKC Electronics

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  • Metals Geek says:
    60 of 61 people found the following review helpful
    4.0 out of 5 stars
    Terrific little board, except for the soldering, December 27, 2011
    Metals Geek (Los Angeles, CA) –

    Amazon Verified Purchase(What’s this?)
    This review is from: Arduino Uno R3 (Personal Computers)

    GOOD: This is indeed the Rev-3 UNO board with the reset button in the upper left corner. It arrived very quickly and seems to work well so far. My C-language test “sketches” (apps) downloaded and ran on the first attempt, using the version 1.0 software download. The components and PCB appear cosmetically to be of reasonably good quality, but …

    BAD: The soldering workmanship is very disappointing; the worst I’ve ever seen in a production job. SMT devices on the top seem to be mounted OK, but the bottom of the board had numerous defects in the (wave?) soldering. Two of these joints appear to have been manually touched up (residual flux present). Several other joints had large gaps in cold solder joints, but were apparently not bad enough to warrant manual repair. I hope the Italian manufacturer (SMART PROJECTS) works out these process kinks soon.

    *** UPDATE July 2012 *** My subsequent purchase of an UNO-R3 board indicates that the soldering issues in early production boards have been solved. (FYI, CanaKit is an approved distributor for Arduino.)

    The Arduino concept is terrific, and has enabled a LOT of people to easily create smart projects. The C compiler and IDE work well; I’ve never had an easier time writing an embedded application, and the price can’t be beat. The only thing lacking is the ability to debug code via single-step.

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