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Arduino Uno - R3

Arduino Uno - R3
Our Price:  £20.52(Inc. 20% VAT)(£17.10 Exc. VAT)Earn 20 Loyalty Points

SKU:  PPA000066
Bar Code:  5055421021238
Part Number:  A000066
Brand:  Arduino


Available Now:  

236 in stock, immediate despatch
Lead Time For Higher Quantities : More than 100 Available within 3-5 Working days
  (25 Reviews)

The Arduino Uno is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, 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. Instead, it features the Atmega16U2 (Atmega8U2 up to version R2) programmed as a USB-to-serial converter.
Revision 2 of the Uno board has a resistor pulling the 8U2 HWB line to ground, making it easier to put into DFU mode.
Revision 3 of the board has the following new features:

  • 1.0 pinout: added SDA and SCL pins that are 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. In future, shields will be compatible both with the board that use the AVR, which operate with 5V and with the Arduino Due that operate with 3.3V. The second one is a not connected pin, that is reserved for future purposes.
  • Stronger RESET circuit.
  • Atmega 16U2 replace the 8U2.

"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; for a comparison with previous versions, see the index of Arduino boards.


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

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Customer Reviews
Average Rating (25 Reviews):  
Write a Review and share your opinions!

Have loads of these
Friday, 1 July 2016  |  Simon

My goto board perfect for any number of project.


1 of 1 people found this review helpful.

Does what it says on the website/forum/hackspace and everywhere else!
Saturday, 2 May 2015  |  Richard

If you've already used an arduino you won't need to read a review, if you haven't then buy one from proto-pic (great price and swift delivery) and get started.
Simple to learn, extremely versatile and well supported on and offline.
I've used them for int

Was this helpful to you?  Yes  /  No

3 of 3 people found this review helpful.

Great value controller
Friday, 27 February 2015  |  Alex

Arduinos are always smaller than I think they are and are great value, especially when you conside the large amount of documentation and help around the web.


2 of 2 people found this review helpful.

Amazing piece of kit!
Wednesday, 25 February 2015  |  Ashley

Order ID #66634

I am a beginner with AVRs however I found this one very easy to use. It has really enhanced my project i am working on.

Also it was delivered very quickly and satisfactorily.

Very pleased all round.


2 of 2 people found this review helpful.

Good product
Wednesday, 14 January 2015  |  Jo

I bought this for my husband as part of his Christmas. I can't say that I know what it's for, but he's happy, so that's what matters!
I do know that he is currently on a mission to do all sorts of electronic wizardry, and has been busy with something in t


2 of 2 people found this review helpful.

Great product for a low price
Monday, 20 October 2014  |  malbro

Arduino Uno is a useful board at a great price, product build is excellent and easy to get operational, just add power supply and USB cable to start working with the Arduino IDE.

Delivery and communications from Proto-Pic were excellent.


2 of 2 people found this review helpful.

A new version, same great product.
Thursday, 31 July 2014  |  Nigel

It's been said below but the addition of the printed pin headers is really great and saves you fiddling with the torch in tighter spaces.

I've been using these for a while and the UNO is a great product, it looks professional, and works like it too.


2 of 2 people found this review helpful.

Better than ever
Wednesday, 14 May 2014  |  Daniel

I've been using Arduino's for years, and the latest addition of the markings on the pin-headers themselves is just an extra bonus. The Uno has always been a flexible and reliable piece of kit for me and has been part of many of my projects.
The only downs


2 of 2 people found this review helpful.

Arduino for Beginners
Wednesday, 30 April 2014  |  J

I am a programmer but have no Arduino or electronics experience. I can however follow a wire diagram. i was persuaded by a friend to buy an Arduino to help him code for a project.

The service by proto-pic was exceptional. The order arrived a few days bef


2 of 2 people found this review helpful.

Great Product, Great Service
Thursday, 3 April 2014  |  Phil

Packaging superb, service superb.


2 of 2 people found this review helpful.

Read all 25 customer reviews...

Proto-PIC - UK Distributor of Sparkfun, Arduino, Adafruit, BBC Micro Bit electrical componentsProto-PIC ; UK Distributor of Sparkfun, Arduino, Adafruit, BBC Micro Bit electrical components