Play around with the basics of Microbit
Table of contents
- Microbit Playground
- Table of contents
- Bill of materials
- Game 1
- Game 2
- Game 3
- Future improvements
- Further reading
Bill of materials
|1||WC6032||Aligator to jumper leads|
|1||PB8819||Breadboard with power|
|1||RP7610||10k Pot (Log)|
The online microbit python editor is our editor of choice. Go to https://python.microbit.org/v/1.1 to open up the editor then copy and paste the python code from this project's resources.
You should be able to download the hex file and copy that onto your microbit drive. For any changes you do to the code you will have to download the hex file and copy it over again.
Game 1 is a type of getting game where you must keep in beat of the music; While playing between each beat of music, we'll point left and right to signify the A and B buttons; then when there is a break in the music, the player must then press the button that was supposed to be played.
We start with some melodies, stored in a list of lists:
tunes = [ ["C4:4", 'C', 'D', 'D', 'E', 'E', 'x', 'G', 'G', 'E', 'E', 'A', 'A', 'x'], ["C4:4", "D", "E", "C", "C", "D", "E", 'x', "C", "E", "F", "G:8", "E:4", "F", 'x', "G:8"], ["C2:2"] + [letter for letter in "ABCDExFGFEDCBABxCDEFxGFEDCxBA"] ]
- You can read more about melodies here: https://microbit-micropython.readthedocs.io/en/latest/tutorials/music.html
Connect the speaker between pin 0 and ground using some aligator clips.
def game1(): # Guess the tone lives = 3 for level, tune in enumerate(tunes): for pos, tone in enumerate(tune): if pos % 2 == 0: display.show(Image.ARROW_W) else: display.show(Image.ARROW_E) if tone != 'x': music.play([tone]) else: correctGuess = game1Guess(level, pos) if correctGuess: music.play(music.POWER_UP) display.show(Image.HAPPY) else: lives -= 1 music.play(music.POWER_DOWN) display.show(Image.SAD) sleep(1000) if lives == 0: gameOver = True return # success! onwards to game 2 game2()
Now to use a potentiometer, you can use
pin1.read_analog() to read a value from the potentiometer.
Connect the center pin of the potentimeter to pin 1, the left pin to 3v, and the right pin to ground.
In this game, you are trying to find the point via sound; keep turning the potentiometer and if the sound gets faster, you're on the right track.
def game2(): lives = 3 for level in range(5): point = random.randint(0, 1023) reading = 0 timing = time.ticks_ms() while reading != point: reading = pin1.read_analog() difference = abs(point - reading) # play tone indicating; faster tone => closer music.pitch(440, difference) # if time is too large; then we lose a life. if time.ticks_diff(time.ticks_ms(), timing) > ((5-level) * 1000): lives -= 1 music.play(music.POWER_DOWN) display.show(Image.SAD) sleep(1000) break if lives == 0: gameOver = True return game3()
Now we will use the accelometer and Servo for the next game; connect the Servo to pin 2.
Here we will read the on-board accelometer values then show that effect on the servo; The aim is to get the servo to 90 degrees for 3 seconds.
There's actually no game-over in this game.
def game3(): # Balance the skateboard # ship = Servo(pin2) # what pin is the servo on? timer = time.ticks_ms() while True: point = random.randint(1023) value = accelerometer.get_x() difference = point - value if difference > 20: display.show("R") elif difference < -20: display.show("L") else: display.show("-") ship.write_angle(90 + (difference/1023)*90) if difference < 20: #must hold it for more than 3 seconds if time.ticks_ms() - timer > 3000: #success! return return else: timer = time.ticks_ms()
- Microbit Micropython documentation https://microbit-micropython.readthedocs.io/en/latest/microbit_micropython_api.html