pxt-microbit
Version:
micro:bit target for Microsoft MakeCode (PXT)
144 lines (90 loc) • 3.27 kB
Markdown
# Dance to the Beat
## 1. Introduction @unplugged
The new micro:bits have speakers, which leaves you free to move around in ways you weren't able to before!
Let's use movement to create a beat box of your own.
## 2. Understanding Input
Let's find out what numbers the micro:bit produces when you move it around.
⇼ Open the ``||serial:^ Advanced||`` category to show the ``||serial:Serial||`` label.
⇼ From ``||serial:Serial||``, drag the ``||serial:serial write value ["x"] = [0]||``
block into the ``||basic(noclick):forever||`` loop container.
```blocks
basic.forever(function(){
serial.writeValue("x", 0)
})
```
## 3. See the Console
When your code runs again, you'll see a button below the micro:bit that says
"Show console Simulator".
Click that button to see what happens.
The graph for the simulator should stay flat at 0
and the text in the console below should say "x:0".
## 4. Acceleration Values
For the graph to change with the speed of your movement, we need to replace the "0"
with the micro:bit **acceleration** value.
⇼ Open the ``||input:Input||`` category and drag ``||input:acceleration (mg) [x]||``
over to replace "0" in the ``||serial(noclick):serial write value ["x"] = [0]||``
block.
⇼ Change "x" to "a" (for "acceleration".)
```blocks
basic.forever(function(){
serial.writeValue("a", input.acceleration(Dimension.X))
})
```
## 5. Look Again
Click the "Show console Simulator" button again.
Now you should see your graph and text change between **-1023** and **1023** as you click
around on the micro:bit simulator to pretend like you're swinging it around.
## 6. Compass Values
For the graph to change with the speed of your movement, we need to replace the "0" with
the micro:bit **acceleration** value.
⇼ Open the ``||input:Input||`` category and drag ``||input:acceleration (mg) [x]||``
over to replace "0" in the ``||serial(noclick):serial write value ["x"] = [0]||``
block.
⇼ Change "x" to "a" (for "acceleration".)
```blocks
basic.forever(function(){
serial.writeValue("a", input.acceleration(Dimension.X))
})
```
## Finale
👏 **YOU DID IT!** 👏
Don't forget to test your code in the simulator!
If you have a new @boardname@ (the one with the **shiny gold** logo at the top), download this code and try it out!
```blocks
basic.forever(function () {
serial.writeValue("Accel", input.acceleration(Dimension.X))
serial.writeValue("Compass", input.compassHeading())
music.playSoundEffect(music.createSoundEffect(
WaveShape.Sine,
input.acceleration(Dimension.X),
input.compassHeading(),
255,
0,
500,
SoundExpressionEffect.None,
InterpolationCurve.Linear
), SoundExpressionPlayMode.UntilDone)
})
```
```ghost
basic.forever(function () {
serial.writeValue("Accel", input.acceleration(Dimension.X))
serial.writeValue("Compass", input.compassHeading())
music.playSoundEffect(music.createSoundEffect(
WaveShape.Sine,
input.acceleration(Dimension.X),
input.compassHeading(),
255,
0,
500,
SoundExpressionEffect.None,
InterpolationCurve.Linear
), SoundExpressionPlayMode.UntilDone)
})
```