About this project
This project turns the BBC micro:bit into an electronic dice, programming the device to display a random number from 1-6 on the LED array when shaken.
What you'll need
1 x BBC micro:bit
1 x Micro USB
1 x Computer or tablet
2 x AAA Batteries & Battery Holder
- Go to the BBC micro:bit website, click 'create code' and begin a new Microsoft Block Editor project.
- From the Input commands menu, drag in an 'if [shake] do' tile.
- When the device is shaken, we want it to display a random number from 1-6. To do this, first we need to create a new variable.
- Attach a 'set [item]' tile, and rename the variable to 'roll'.
- Now go to the Math command menu and attach a 'pick random  to ' tile. Change the figure in the dialog box to 5, like so:
- Because the roll has a range of 0-5 rather than 1-6, we have to tell the device to show the number one when it rolls a zero, the number two when it rolls a one, and so on.
- Drag in an 'if/do' tile and, for 'if', attach a ' = ' tile from the logic menu. Drag a 'roll' variable into the left dialogue box.
- For 'do', attach a 'show leds' tile and set it to display the 'one' side of a standard dice by lighting up a single bulb at the co-ordinate 2/2.
- Click on the blue cog symbol in your 'if/do' tile and add an 'else if/do' option.
- Use this to program your BBC micro:bit to display the 'two' side of the dice when the device rolls a one.
- Using more 'else/if' and 'else' tiles, repeat the steps above so that when the roll is 2, 3, 4 5, the device shows a 3, 4, 5 and 6 dice side respectively.
- You're done! Run your program to test it in the right-hand emulator, then click compile to download the script and transfer it to your BBC micro:bit.
When your students have mastered this project, what else can they do with the random command? Challenge them to develop different projects using the LED array, such as a dice that displays images rather than numbers, or a 'trick dice' that only rolls even numbers. Let us know what they come up with in the comments section below...