54 lines
1.1 KiB
Markdown
54 lines
1.1 KiB
Markdown
|
# night light challenges
|
||
|
|
|
||
|
|
Coding challenges for night light.
|
||
|
|
|
||
|
|
## Before we get started
|
||
|
|
|
||
|
|
Complete the following [guided tutorial](/microbit/lessons/night-light/activity), your code should look like this:
|
||
|
|
|
||
|
|
|
||
|
|
```blocks
|
||
|
|
led.setBrightness(255)
|
||
|
|
basic.showLeds(`
|
||
|
|
# # # # #
|
||
|
|
# # # # #
|
||
|
|
# # # # #
|
||
|
|
# # # # #
|
||
|
|
# # # # #
|
||
|
|
`)
|
||
|
|
input.onButtonPressed(Button.A, () => {
|
||
|
|
led.setBrightness(64)
|
||
|
|
})
|
||
|
|
|
||
|
|
```
|
||
|
|
### Challenge 1
|
||
|
|
|
||
|
|
### @video td/videos/night-light-2
|
||
|
|
|
||
|
|
What if we want to turn off all the LEDs? Let's do this by setting the brightness to `0` when button `B` is pressed. Add an event handler with `on button pressed(B)` add `set brightness(0)` to turn off the LEDs.
|
||
|
|
|
||
|
|
|
||
|
|
```blocks
|
||
|
|
led.setBrightness(255)
|
||
|
|
basic.showLeds(`
|
||
|
|
# # # # #
|
||
|
|
# # # # #
|
||
|
|
# # # # #
|
||
|
|
# # # # #
|
||
|
|
# # # # #
|
||
|
|
`)
|
||
|
|
input.onButtonPressed(Button.A, () => {
|
||
|
|
led.setBrightness(64)
|
||
|
|
})
|
||
|
|
input.onButtonPressed(Button.B, () => {
|
||
|
|
led.setBrightness(0)
|
||
|
|
})
|
||
|
|
```
|
||
|
|
|
||
|
|
|
||
|
|
**Challenge 3**
|
||
|
|
|
||
|
|
Add an event handler with `on shake` to change the LED brightness back to a `255`.
|
||
|
|
|
||
|
|
* `Run main` your script to see the LEDs change brightness.
|