• Introduction

    If you are new to the BBC Micro:bit, you might be wondering what it is all about. One way to find out is just to explore by playing around. These programs will help form a guided tour through some of of the capabilities of the Micro:bit. These examples are not meant to be a pedagogical example of how to teach using rich and engaging examples.... let the students play and just guide them with hints when they hit roadblocks and are ready to learn new things! Help them learn to figure things out on their own and to choose their own goals for building and learning. The Micro:bit is simple enough and user-friendly enough to allow this to happen.

     

    If you need help finding out what a block does: https://www.microbit.co.uk/blocks/contents

     

    Have fun!

  • Warm- ups

    A few simple programs to help you get started

    What URL?

    Finding the coding web page

    There are two main block-based coding web pages for the Micro:bit. The simpler version is at this URL: http://microbit.co.uk/create-code

    Hello world

    Your first Micro:bit program

    This simple program displays words and letters on the LED screen of your Micro:bit. You can find the blocks you need in the 'basic' tab. Just drag them out and drop them to snap together.

    Testing your code

    Running your code

    To run your code just click on the play button. This will swap your screen to a virtual Micro:bit

    Virtual Micro:bit

    Simulate running your code

    Here is what the virtual Micro:bit looks like. To return to the coding, click on the Micro:bit symbol in the upper right-hand corner.

    Display numbers

    Getting data out

    Use a numbers block to display numbers, because numbers are different from the strings of letters that make up words.

    Events

    Use buttons to trigger your code

    Turn on the LEDS of your Micro:bit using the left button. Click on the virtual 'A' button to activate the LEDs. You can find the purple 'on button' block in the input tab.

    Loops

    Blink an LED

    How could you make the blink slower?

    Decisions

    If blocks

    Use buttons to interact with your Micro: bit. You can find the 'if' blocks in the logic tab. The 'button pressed' blocks can be found in the input tab.

    If else blocks

    Where do I find them?

    To use an 'if/else' block you need to get an 'if' block, then click on the gear and drag an 'else' block into the jaws of the 'if' block, then click on the gear again.

    Better decisions

    Choosing alternatives via if/else

    Use the B button on your Micro:bit to turn an LED on/off.

    Read a sensor

    Using in-built sensors

    Use the built-in compass to find the direction your Micro:bit is pointed. Be sure and use your mouse to move the compass around.

    Ins and outs using pins

    How to add external sensors

    You can add external sensors to your Micro:bit using so-called 'pins' labelled 0, 1, and 2, shown at the bottom of this Micro:bit.

    Reading pins

    Using the analog read block

    This code reads the value of pin zero (P0) and displays it on your Micro:bit. You can find the 'analog read' block under the 'pins' tab. When you run this program click on the virtual pin zero to change the number displayed.

    Theory

    Why analog read gives you 1023

    Digital reads give only on/off, represented by either '1' or '0'. Analog reads are designed to measure things that vary continuously, like light levels, soil moisture levels, or sound waves. Analog reads can give any value between zero and 1023. 1024 is 2^11, represented inside a computer as 11111111111 in binary.

    Bonus: servos

    Make virtual windscreen wipers

    Servos are like motors that only rotate 180 degrees and have very precise angle control. They are used for steering in RC cars. The 'servo' block can be found under the 'pins' tab.

    Bonus: 'for' loops

    Make limited loops

    Count upwards to 4 then repeat. You can find the 'for' loop block under the 'loops' tab. You can find the loop variable 'i' under the variables tab.

    Bonus: Radio

    Simple Micro:bit to Micro:bit wireless communication

    Try using this code. The pink blocks are found in the 'radio' tab. The 'recievedstring' is a variable, found in the variable tab. When you click on the button A in the virtual Microbit, you should see two Micro:bits in your virtual machine.

     

     

    Bonus: LED strips

    Make cool LED tricks with simple code

    Neopixel LED strips allow you to individually control the color of each individual LED in a strip of LEDs. To use them with the Micro:bit we will need to use the advanced page: https://makecode.microbit.org/

    Go to the advanced tab and choose add package, and then add the Neopixel library. Now you should have a new tab called Neopixel.

     

     

    Bonus: LED strips- part 2

    Make cool LED tricks with simple code

    Here is some code to control your Neopixel strip. 'item' and 'item2' are variables, found under the 'variables' tab. You need to create a new variable called 'item2' The rest of the blocks are found under the basic tab or the Neopixel tab. With this code, what happens to the blue spot in the LED strip?

     

     

  • Are you ready?

    You should have a basic idea of how to use the BBC Micro:bit. Now you should be ready to start learning how to use your Micro:bit with external sensors. You can start the next step of your journey at http://waterbot.strikingly.com

     

  • Profile

    Bob Elliott

    Robotics enthusiast

    Bob is a maths/science/robotics teacher with degrees in biology and computing. He has been a member of the Robotics Tamania committee for several years, helping to run the Tasmanian state finals of Robocup Jr. He runs several local robotics club and with his collaborators, runs Arduino/Micro:bit robotics and IoT workshops.

  • Contact Us!

    To get help building, programming or hosting a workshop: