16 top BBC micro:bit projects
Learn everything from beginner projects to challenges for confident coders
Since 2012, the Raspberry Pi has been the go-to device for computer hobbyists and tech enthusiasts, but it isn't the only product available.
The BBC has one of its own - micro:bit - which offers another way of introducing children to the world of coding. It provides a flexible way to design and build projects that let imaginations run wild.
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The initial setup included a 16MHz ARM CPU which was used to power endless project ideas, some of which are listed on the BBC's micro:bit website. In 2020, the micro:bit was subject to a major update that brought new hardware and features. The latest version of the device is said to be four-times faster than its predecessor, with a 64MHz Arm processor and eight times the amount of RAM (128kb).
Much like the Raspberry Pi, the simplicity of the micro:bit makes it a great choice for beginners - regardless of age. So, whether you want to build a robot or invent a game, the micro:bit is a great place to start. We've collated our favourite projects to help get you started.
Getting started with the micro:bit
For each of these projects you can either follow the chosen programming language, or follow the guidance and adapt the steps for one of the other three programming languages supported by the micro:bit.
The programming language the micro:bit supports are:
- Microsoft Block Editor: a graphical drag-and-drop editor
- Microsoft Touch Develop: a text-based language, which comes pre-installed with a library of micro:bit commands
- MicroPython: a robust, text-based editor used by professional software developers
You can find tutorials and information about each of these programming languages on the micro:bit site.
Make your own light to illuminate your room during the dark night and customise it as you see fit. Thanks to the light sensor, your micro:bit can tell when light falling on the device gets to a certain level, which you can adjust, and lights up the device's LEDs. If you want, you can even change the image displayed on the micro:bit when it gets dark or even make it flash. It can be used as a safety light when you’re walking or cycling, or keep it in your room to appreciate its soothing glow.
Micro:bit Morse Code Machine
By John Goodman (M0RVJ)
Because multiple microcomputers can talk to each other via shortwave radio signals, it's perfect for using as a Morse Code machine. This demo by John Goodman shows a BBC micro:bit hooked up to a pair of CW transceivers.
While one can be used for inputting the dashes and dots in sound using a piezo buzzer, while the other is hooked up to a speaker. It also features capacitive touch for inputting the code with just a few taps of the finger on the micro:bit. The code is stored in the memory as letters, so you can easily see what code has been sent between the two for reference (or if you're not adept at translating the beeps produced by the board.
The microcomputers are coded using Micropython and John has made the code available on GitHub. He's finessed the design since its original implementation to boost the range throughout a building and it now includes a menu that you can use by shaking the device.
Micro:bit Radio communicator
This easy project takes advantage of the micro:bit’s radio function in order to send and receive numbers, which is made possible by the 2.4GHz radio module built into device’s Nordic Semiconductor nRF51822. You won’t need a lot of equipment to execute this, but this project only works if you have two micro:bits. Hence, it’s worth involving another person in this project, as it’s all about collaboration and communication – using numbers and wireless radiofrequency, of course.
First and foremost, you need to download this programme to both of the micro:bits being used in this project. Next, utilise the "A" and “B” buttons to adjust the numbers you wish to communicate: “A” will decrease the number by 1, while the "B" button will increase the displayed value by 1. Adjust the value until the micro:bit displays the number that you wish to send. Once you’re happy with it, you’ll want to send it over to the second micro:bit and its owner – this can be done by clicking "A” and “B" simultaneously. The receiving micro:bit will likely showcase the number sent from the first micro:bit within seconds.
Although this project might be deemed too simple, it’s perfect for those who are new to micro:bit – adults and youngsters alike. In fact, the project can be incorporated into a range of communication-based activities, including developing your own numeric-based, coded language. In essence, the project is reminiscent of classic two-way radio, “walkie-talkie” games, but upgraded to include .hex or Java.
Micro:bit Compass North
Never lose your sense of direction again thanks to this handy little compass that will show you which way is North. Your micro:bit has a compass sensor, also known as a magnetometer, that measures magnetic fields. When you first use it, you’ll have to calibrate it by tilting the device to light up each LED. Once you’ve got it up and running, it will show an “N” on the display when your device is pointing roughly in the right direction.
By Code Club
Frustration is a very basic but oh-so-addictive game that you're quite possibly familiar with already. It consists of a metal hoop or loop that you have to guide along another metal wire without the two touching. If contact is made, a buzzer goes off and you have to start again. This project shows you how to make your own version of the game, with the micro:bit showing the number of attempts, rather than making a noise.
Micro:bit Reaction game
The micro:bit can be used to test your reflexes with a reaction game made with just cardboard, tin foil, and two micro:bit pins.
Start with two squares of cardboard and attach two smaller squares of tin foil to each. The micro:bit's GND pin connects to each pad of tin foil with the other ends connecting to pin 1, for player A and pin 2 for player B.
The program will show a 'heart' on the LED display at a random time between 1 and 5 seconds, and players are required to hit the pad as soon as it appears. The winner is the person that hits their tin foil pad first. This is all done through boolean logic, using a set of variables that are either set to True or False. The game works under an infinite loop to allow players to continue playing.
Micro:bit Flashing heart
By Microsoft Block
One of the simplest micro:bit projects to cut your teeth on is to make the device's LED grid form a flashing heart. You can create the code in the Microsoft Blocks graphical editor. The BBC tutorial will guide you through how to do this, and once you've got your head around it, the same principals can be used to make other shapes.
Micro:bit countdown timer
By 101 Computing
We can't think of many practical uses for a nine-second countdown timer - besides using it to trial 100-metre Olympic sprinters. However, 101 Computing's tutorial is a novel example of how the LEDs can be used to display numerals.
Micro:bit Combination Lock
By BBC Make It Digital and Wolfblood
Combination Lock is an easy way to protect your stuff and even to warn you of burglaries. The project relies on using the micro:bit to detect whether a circuit is complete or broken. By creating a circuit of copper tape and attaching a buzzer, your micro:bit will sound an alarm when the protected box, door, or drawer is opened. This tutorial walks you through setting up your very own lock and passcode.
Micro:bit Touch arpeggiator
By Technology Will Save Us
This is one of the most fun and relatively simple Micro Bit projects so far. Inspired by the BBC Touch Develop tutorial Banana Keyboard', it guides you through how to turn your Micro Bit into a touch-activated tone generator. All you need is an electronic buzzer, four wired crocodile clips, a micro-USB cable, and, erm, some fruit. Using this method, you could even play musical scales with more than one buzzer.
Micro:bit Step counter
By The Institute of Engineering and Technology
"I'm walking out the door with my micro:bit on my mind" is what you could be saying with if you follow this exquisite, and more involved, guide on how to turn your micro:bit into a stepometer. Following this project you'll be able to create a working stepometer that could compete with commercial equivalents.
Micro:bit Electronic name tag
By Technology Will Save Us
If you are a regular at technology conferences, or indeed any other conferences, then you’ll be familiar with having to wear a lanyard or name badge that allows you to hop between once talk or conference section to another. But such tag can be rather dull, so why not add a little pizzazz into your with a personalised badge powered by the micro:bit.
To get started you’ll need a micro:bit Telec version, a AAA battery cage with two AAA batteries, and some proficiency with a needle and thread. You won’t need much else, as this is a rather entry-level project to get you familiar with coding on the micro:bit; with a little bit of practice, you can get the LEDs to display things like basic emojis.
Once set up, you should have a badge that’ll at least set you apart from other conference attendees, and might even see you end up networking with more success.
Micro:bit LED circuit game
By Intense Computer Training
This project, from Intense Computer Training, is actually a fair straightforward circuit game. Following the video tutorial (no text version available at the time of publishing), you'll learn how to code the LED display so that individual LEDs can represent your counter on the five-by-five grid.
Micro:bit racing game
By 101 Computing
This project is a ridiculous slice of work-time fun that's just waiting to engage (or possibly disrupt) classrooms and lunch halls in Britain. Following this tutorial you'll turn the micro:bit's LED display into a drag racing game for up to five players. 101 Computing guides you through creating the game and duplicating the code for additional players.
Micro:bit Temperature reader
The micro:bit can also be turned into a pretty decent temperature reader. While it lacks a heat sensor, you can configure it to display the temperature of, say, a CPU, which is pretty handy for PC builders. Things get even more interesting when you add a thermistor to the micro:bit, which can be dipped into food and drinks to record the temperature directly – though this requires some advanced coding and is only for the most dedicated micro:bit enthusiasts.
Micro:bit Irrigation system
When given the simple task of watering a classroom spider plant, a group of Canadian schoolchildren decided to use a micro:bit to build an irrigation system instead.
The Grade 7 students from St. Thomas the Apostle Catholic Elementary School in Hamilton, Ontario, had been studying the impacts of fertiliser use on the environment, as well as indoor farming technologies and hydroponics. They were then given the opportunity to use their knowledge in combination with some basic programming skills, by building a system which would sense when the plant becomes dry and needs to be watered with the help of a programmed water pump.
Their teacher Rodenna Fallis told The Spec that group projects like this are beneficial in raising “critical thinkers, problem-solvers and thoughtful collaborators".
“My whole mission is to make them feel equipped in the digital world ... and how to be good stewards of the earth. This is exactly why I love teaching my kids coding, because they just feel like they’re a part of something bigger," she added.
Images in this article courtesy of the respective parties behind each project
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