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added various tutorials

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Peli de Halleux
2016-05-09 10:32:02 -07:00
parent 5fcf9165ea
commit 13f42f5892
10 changed files with 166 additions and 68 deletions
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75
docs/lessons/glowing-pendulum/activity.md
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@ -4,10 +4,29 @@ Construct a pendulum that glows using acceleration.
Welcome! This activity will teach how to construct a pendulum that glows using acceleration. Let's get started!
Turn on all the LEDs.
```blocks
basic.showLeds(`
# # # # #
# # # # #
# # # # #
# # # # #
# # # # #
`)
```
Create a **forever** loop that will constantly display the appropriate brightness on the LED display.
```blocks
basic.showLeds(`
# # # # #
# # # # #
# # # # #
# # # # #
# # # # #
`)
basic.forever(() => {
})
@ -16,6 +35,13 @@ basic.forever(() => {
Now let's measure the acceleration on the `y` axis and store that value in a variable. The `acceleration(y)` function will provide the value.
```blocks
basic.showLeds(`
# # # # #
# # # # #
# # # # #
# # # # #
# # # # #
`)
basic.forever(() => {
let acceleration = input.acceleration(Dimension.Y);
});
@ -25,9 +51,15 @@ Since the micro:bit will be swinging back and forth, the acceleration will only
```blocks
let acceleration = 0;
basic.showLeds(`
# # # # #
# # # # #
# # # # #
# # # # #
# # # # #
`)
basic.forever(() => {
acceleration = input.acceleration(Dimension.Y);
let acceleration = input.acceleration(Dimension.Y);
acceleration = Math.abs(acceleration)
});
```
@ -35,6 +67,13 @@ basic.forever(() => {
The function `acceleration(y)` returns a number between 0 and 1024. We want to use this value for the brightness of the micro:bit, but the `set brightness()` only accepts a value between 0 and 256. Thus, we need to divide the acceleration by 4 to ensure we will be in the appropriate range.
```blocks
basic.showLeds(`
# # # # #
# # # # #
# # # # #
# # # # #
# # # # #
`)
basic.forever(() => {
let acceleration = input.acceleration(Dimension.Y);
acceleration = Math.abs(acceleration);
@ -46,37 +85,19 @@ basic.forever(() => {
Now let's use our acceleration value to set the brightness on the micro:bit.
```blocks
basic.showLeds(`
# # # # #
# # # # #
# # # # #
# # # # #
# # # # #
`)
basic.forever(() => {
let acceleration = input.acceleration(Dimension.Y);
acceleration = Math.abs(acceleration);
acceleration = acceleration / 4;
led.setBrightness(acceleration)
});
```
Let's show what the brightness of the micro:bit is by turning all the LEDs on!
```blocks
basic.forever(() => {
let acceleration = input.acceleration(Dimension.Y);
acceleration = Math.abs(acceleration);
acceleration = acceleration / 4;
led.setBrightness(acceleration)
basic.showLeds(`
# # # # #
# # # # #
# # # # #
# # # # #
# # # # #
`)
});
```
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