59 lines
1.2 KiB
Markdown
59 lines
1.2 KiB
Markdown
# night light quiz answers
|
|
|
|
Answers to the night light quiz. #LED #image #brightness #fade #docs
|
|
|
|
This is the answer key for the [night light quiz](/microbit/lessons/night-light/quiz).
|
|
|
|
## 1. Define the function "set brightness"
|
|
|
|
This function sets the brightness of the LED screen.
|
|
|
|
## 2. Consider the following image
|
|
|
|
|
|
|
|
If the rectangle above represents the BBC micro:bit, write the code to set all the LEDs to full brightness and to turn on all the LEDs.
|
|
|
|
<br />
|
|
|
|
```blocks
|
|
led.setBrightness(255)
|
|
basic.showLeds(`
|
|
# # # # #
|
|
# # # # #
|
|
# # # # #
|
|
# # # # #
|
|
# # # # #
|
|
`)
|
|
```
|
|
|
|
## 3. Consider the following image
|
|
|
|
|
|
|
|
If the rectangle above represents the BBC micro:bit, write the code to set the screen brightness to 50% (128) and turns on all the LEDs.
|
|
|
|
<br/>
|
|
|
|
```blocks
|
|
led.setBrightness(128)
|
|
basic.showLeds(`
|
|
# # # # #
|
|
# # # # #
|
|
# # # # #
|
|
# # # # #
|
|
# # # # #
|
|
`)
|
|
```
|
|
|
|
## 4. Consider the following image
|
|
|
|
|
|
|
|
If the rectangle above represents the BBC micro:bit, write the code to turn off all the LEDs.
|
|
|
|
```blocks
|
|
led.setBrightness(0)
|
|
```
|
|
|