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Arduino UNO R3 Development Board

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Quoting product code: N30KU


About this product


  • Start your electronics and coding projects with the user friendly, open source Arduino Uno R3
  • Use with Arduino shields to enhance your project
  • Can be powered using a USB-B or external DC power supplies

Product overview

• Start your electronics and coding projects with the user friendly, open source Arduino Uno R3
• Use with Arduino shields to enhance your project
• Can be powered using a USB-B or external DC power supplies
• With 14 Digital I/O Pins easily control many components from RGB LEDs to Servos, screens and more
• Using Arduino has never been easier, with thousands of tips, tricks and guides readily available online.

Reasons to pick the Arduino Uno R3
The Arduino Uno R3 is one of the most commonly used Open-Source Arduino boards. Start any electronics or coding projects readily available online in the huge Makers community, or design a project yourself. The Arduino Uno R3 grants a lot of flexibility, giving you a great amount of I/O pins to work with, a quick reset button, and machine screw holes to mount the board however you please. This board also uses the ATmega328 Microcontroller, giving you have enough power and memory to store and run lot of complex code.

The best bit about the Arduino Uno R3 is that you don’t need to solder at all, using header jumper pins you can easily, and quickly, connect and disconnect: shields, breakouts, components, or even expand into a standalone breadboard.

Connections and Expansion
This board has 14 Digital I/O pins allowing you to individually control a large amount of components. I/O pins can each to control a limb for a walking talking robot, control hundreds of RGB LEDs, or build your own keypad controlled electronic door lock, and so much more, it will be difficult to push this board to its limits.

The Arduino Uno R3 also has 6 Analogue pins which are perfect for analogue sensors. You can use analogue sensors to make your very own smoke detector, tell if a plant has enough moisture, to detecting if something has triggered a pressure mat!

What will you make?
With the ever expanding range of tutorial guides available, you can start by telling a single LED to flash, or to tell a thousand LEDs to draw you a picture. Using a coding languages called C/C++, these skills easily translate to most general software languages, so with this you’ll be learning a lot more than electronics. Arduino shields come in many shapes and sizes, from providing solder-able break-out boards, a 1.8" TFT screen with micro SD slot and joystick, to a servo and motor control board.

Another great range of accessories are called Breakouts, tiny shields that link together just as easy usually providing more specific uses.
Shields and Breakouts allow you to more easily manage a lot of components in any project, you can view our range of shields and breakouts by clicking here.

Ease of Use
Arduino is fantastic for all ages, whether you have previous experience or not, from fun to functional. Tutorials will tell you exactly what you will need, even what pins to connect your components into, giving you a step by step, start to finish.

Using the Arduino IDE Software, it will allow you to very easily update your Arduino board with the code you’ve prepared, making the transfer seamless; it will even let you know whether your code makes sense and will work before you even upload it.

Start by;
Making an LED Blink,
Design your own Mood Light,
Make a Boat that can explore vast bodies of water,
Or even use your Phone to control your Arduino.

Arduino IDE software is needed to program an Adafruit, it’s not in the box. Download from here:
Works on Mac, Windows and Linux based computers including Raspberry Pi's Rasbian software

Arduino's site.

Rated 5 out of 5 by from The Uno is the board I would recommend for beginners to Arduino. The ease of programming in a derivative of C makes it ideal for new National Curriculum activities in which all schoolchildren must be instructed in programming; the ease of programming belies the power inherent in this board. In addition, for those who know little about electronics, subsidiary circuitry attached to the pins will teach very quickly. However it is useful not only in the educational market but also as a bone-fide stand alone microcontroller that can be left embedded in projects. The Uno is the ideal starting board- as your knowledge grows, it opens up ever more capabilities for further growth.
Date published: 2013-03-05
Rated 5 out of 5 by from Arduino UNO - A brilliant tool! This little thing is absolutely fantastic, it is a great tool for those who wish to get into programming! The support you get on the web, in the Arduino software and the way the Arduino has been laid out and built makes it really easy to grasp and to understand! I learnt how to use the Arduino in a matter of a few days by watching youtube tutorials and playing around with examples that came with the Arduino programming software, which I downloaded from the Arduino website. This purchase was most definitely worth it. Ј25 well spent! I have to say, I have made some neat projects so far and I have come up with some great ideas for projects to do in the future because of the Arduino. It has kept my interest in electronics alive.
Date published: 2014-01-09
Rated 5 out of 5 by from This is a great starter board that will give you a wide range of components to start you off in the world of electronics. To the beginner the board may seem a little overwhelming but there are a myriad of tutorials online as well as the 'Getting started with Arduino" book which should get you going in no time at all.
Date published: 2013-09-27
Rated 5 out of 5 by from Arduino UNO This was bought with a specific project in mind but also for some tinkering. having done some research I found that not all boards are equal. this genuine board has a resettable fuse to protect my PC against short circuits most clones do NOT. although slightly more expensive than auction sites the quality shines through. highly recommended.
Date published: 2014-01-26
Rated 5 out of 5 by from I found this board to be exactly what I needed for the project I was working on (to create a simplified version of the GPIB bus for testing an old circuit board that was once part of a GPIB bus- based system). The set up and use of the board was very straightforward and I liked the way that the c-based programs could be quickly and easily downloaded to the board (I did need to buy the Proto-shield board as well to make the necessary connections to the board. Overall I think this Arduino board is very good value for the price.
Date published: 2014-10-21
Rated 5 out of 5 by from Arduino Love this Thing Great for teaching kids basic electronics and programming And maplin sell the official boards not some clone like the ones on some auction sites
Date published: 2013-12-15
Rated 4 out of 5 by from Bought for University Project I bought the Arduino to use in my final year project at university. I haven't really exploited it much but it does what it says on the box.
Date published: 2017-03-27
Rated 5 out of 5 by from Arduino Uno R3 This product was exactly what I needed, and delivery was brilliant, a great service from Maplins, would definately recommend. Baz
Date published: 2017-02-23
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Microcontroller: ATmega328
CPU Clock Speed 16 MHz
Operating Voltage 5 V
Input Voltage 7 / 12 V DC, or 5 V from USB
Digital IO/PWM 14/6
Analogue Inputs 6
ISCP 2x6
Programming Interface USB
USB Serial Controller USB-B
Flash Memory 32 KB (0.5 KB Occupied)
Board Version 3
Special Features Reset Button
Mounting screw holes
Dimensions 68.6 mm x 53.4 mm x 15.1 mm

How much current will the 3.3volt pin supply?

Asked by: Malcolm
50ma You can find a wealth of information regarding the UNO and all Arduino shields and board variations on the manufacturer web page, here is a link to get you started
Answered by: Les
Date published: 2018-01-28

does it come with any cables

Asked by: yode
No cables are included. Box Contains 1x Arduino Uno R3
Answered by: darren cordon
Date published: 2017-04-21

I have bought a Uno R3 and a 2x16 LCD display code NO7DH. The Arduino works but the LCD does not. It shows one line of 16 square black blocks. The LCD display has no numbers on its pins, but the Arduino does. What are the correct connections for this?

Asked by: G6AJF
Full details for the screen are in the link below
Answered by: Dominic
Date published: 2016-07-26

How meny volts dose the pins input and output

Asked by: Diamond 2604
This service is for frequently asked questions and does not allow two way communication, In order for us to best assist you with your technical issue please contact us on the details below: 0333 400 9500 or email
Answered by: Billy
Date published: 2016-07-17

Hi, does this device support: - assembly language - C - C++ - C++11 Thank you.

Asked by: Doug Loughren
It uses a  cut down version of C++, you can find a language reference here if you want to see for yourself:
Answered by: Andrew C
Date published: 2016-05-18

can is board be used on a DIY gamer kit 

Asked by: jack1999
Yes this will work fine in your intended application.
Answered by: Darren
Date published: 2016-05-10

can this unit hold it's memory even when it's disconnected from the power supply?

Asked by: workerdrone01
Yes this will still hold its memory once the power has been disconnected.
Answered by: Billy
Date published: 2016-03-26

Is it a clone or the official board?

Asked by: jimb
This is the official board.
Answered by: Billy
Date published: 2016-10-31
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