Which way now?

Primeiro passo: o projeto

O que é?

Shake your micro:bit and be given a random direction to walk. You will learn about variables, and using random numbers, selection and comparison logic blocks.

Estes dois vídeos mostram o que você fará e como desenvolver o código:

Como funciona:

• The program uses a variable called “direction” to store a random number.
• Variables store numbers or values that can change in a computer program.
• Shake the micro:bit to set “direction” to a random number between one and three.
• The program then uses selection and comparison logic blocks to test the value of the variable.
• If “direction” is equal to 1, then an arrow pointing north shows on the micro:bit’s LED display. If “direction” is equal to 2, then the arrow points east. Otherwise, the arrow points west.
• To make the battery last longer, the program pauses for half a second after the arrow appears then clears the screen.

Itens necessários:

• Um micro:bit (ou simulador MakeCode);
• Editor MakeCode;
• pacote de bateria (opcional mas recomendado)

Segundo passo: é hora de programar

1# Imports go at the top
2
3
4
5from microbit import *
6import random
7
8while True:
9    if accelerometer.was_gesture('shake'):
10        random_number = random.randint(1, 3)
11        if random_number == 1:
12            display.show(Image.ARROW_N)
13        elif random_number == 2:
14            display.show(Image.ARROW_E)
15        else:
16            display.show(Image.ARROW_W)
17    sleep(2000)
18    display.clear()

Terceiro passo: vamos deixar o código ainda melhor

• Add more directions.
• Use buttons to show icons for skipping, running, and jumping.
• Combine with the touch stopwatch program to make a motivational tool to use in sports lessons.

Thanks to David Hay, an educator in Alberta, Canada for sharing this brilliant project idea with us.