Micro:bit Projects: LED Dice by IWASP. EU

Mimic the roll of a dice by connecting an array of LEDs to the versatile BBC micro:bit, a bit of Python code, and hey presto, start rolling!

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Micro:bit Projects: LED Dice by IWASP. EU

Things used in this project

Hardware components

BBC micro:bit board
BBC micro:bit board
LED (generic)
LED (generic)
Breadboard (generic)
Breadboard (generic)
Jumper wires (generic)
Jumper wires (generic)
Resistor 221 ohm
Resistor 221 ohm


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Circuit Diagram for LED Dice project - by IWASP.EU

Visit iwasp.eu/microbit for further information


Python Code for the LED Dice project by IWASP.EU

visit iwasp.eu/microbit to download the code as text or as a compiled 'hex' file to download directly to your microbit.
I design the code to hopefully be readable and understandable as opposed to highly 'purified'. and condensed.
#copyright 2017 iwasp.eu

from microbit import *
import random

port = [pin0,pin1,pin8,pin16,pin12,pin2,pin14] #List of GPIO pins to use

def outputDice(disp,roll): #Function to display rolled number on the screen and LED array

    for n in range(7): # Turn off all GPIO pins and LEDs

    for n in range(7): #Check values in dice array and where value is '1', turn on corresponding LED.
        if (disp[n]==1):
    display.show(str(roll)) #dislay on screen

def randomFlash(): #Function togenerate random LED flashing, mimicking dice rolling action

    for n in range(7): # Turn off all GPIO pins and LEDs

    light=[] #list to hold which LEDs to be randomly on.

    for pop in range(0,15): #populate array with 16 random dice numbers 1-6

        light.append(random.randrange(1,7)) #add a random dice LED number into the array

    for n in range(0,15): #Flash 16 random dice lights

        port[light[n]].write_digital(1) #turn on LED corresponding to next entry in 'light' list
        sleep(75) #do nothing, keeps LED on for 0.075 seconds
        port[light[n]].write_digital(0) #turn off LED
rollagain = "y"

while (rollagain == "y"): #main loop continues to generate dice roll until user ends

    diceRoll = random.randrange(1,7) #generate random roll value

    #create LED dice list dependant on roll value
    if (diceRoll == 1):

        dice = [0,0,0,1,0,0,0]

    elif(diceRoll == 2):

        dice = [1,0,0,0,0,0,1]

    elif(diceRoll == 3):

        dice = [0,0,1,1,1,0,0]

    elif(diceRoll == 4):

        dice = [1,0,1,0,1,0,1]

    elif(diceRoll == 5):

        dice = [1,0,1,1,1,0,1]

    elif(diceRoll == 6):

        dice = [1,1,1,0,1,1,1]

    # dice list item places
    #  0 1 2
    #    3 
    #  4 5 6
    # dice microbit pin numbers
    #  0  1  8
    #     16
    #  12 2 14

    randomFlash()   #call function to mimic dice roll with random LED flashes

    outputDice(dice,diceRoll)  #call function with dice list and roll value to display
                               #the dice value on screen and on LED array

    rollagain = "n"
    # wait for button A or B to be pressed before continuing to next roll
    while (rollagain == "n"):
        if (button_a.is_pressed() or button_b.is_pressed()):
            rollagain = "y"

#end of main loop




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