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seis challenge

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Michael Elliot Braun 2016-05-11 14:52:25 -07:00
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docs/lessons/screen-wipe/challenges.md
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@ -4,7 +4,7 @@ Coding challenges for screen wipe.
## Before we get started ## Before we get started
Complete the [screen wipe](/lessons/screen-wipe) activity and your code will look like this: Complete the [screen wipe](/lessons/screen-wipe/activity) activity and your code will look like this:
```blocks ```blocks
basic.showLeds(` basic.showLeds(`

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docs/lessons/seismograph/challenge.md
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@ -1,17 +1,51 @@
# Challenge # Challenge
Coding challenges for screen wipe.
## Before we get started
Complete the [seismograph](/lessons/seismograph/activity) activity and your code will look like this:
```blocks
basic.forever(() => {
led.plotBarGraph(input.acceleration(Dimension.Strength) - 1023, 0);
});
```
### ~avatar avatar ### ~avatar avatar
Welcome! The activity will teach you how to use the acceleration of the 1st micro:bit and to visualize the acceleration on the 2nd micro:bit. Let's get started! Computer Science: Welcome! The activity will teach you how to code the acceleration of the 1st micro:bit and to visualize the acceleration on the 2nd micro:bit. Let's get started!
# Computer Science Steps
## 1.
We want to break apart the blocks from the activity. We will be using the blocks from the activity to create a brand new program to have micro:bit devices communicate through the BLE (Bluetooth low energy) radio.
```shuffle
basic.forever(() => {
led.plotBarGraph(input.acceleration(Dimension.Strength) - 1023, 0);
});
```
## 2.
### ~
Let's measure `acceleration (mg)` and then `send number`. `Acceleration` is measured in **milli-gravities**, so a value of -1000 is equivalent to -1g or -9.81m/s^2. We will be able to get the acceleration value (g-force), in the specified "x" dimension. `Send number` will broadcast a number data packet to other micro:bits connected via radio. Let's measure `acceleration (mg)` and then `send number`. `Acceleration` is measured in **milli-gravities**, so a value of -1000 is equivalent to -1g or -9.81m/s^2. We will be able to get the acceleration value (g-force), in the specified "x" dimension. `Send number` will broadcast a number data packet to other micro:bits connected via radio.
We need attach send number found in the Radio drawer. We will attach send number to acceleration.
Your finished code will look like this:
```blocks ```blocks
radio.sendNumber(input.acceleration(Dimension.X)); radio.sendNumber(input.acceleration(Dimension.X));
``` ```
### ~
We want to display the acceleration forever. In order to do so, we need a `forever` loop. A forever loop will repeat code in the background forever. ## 3.
We want to display the acceleration forever. In order to do so, we need a `forever` loop. A forever loop will repeat code in the background forever. We need attach forever loop to send number.
Your finished code will look like this:
```blocks ```blocks
basic.forever(() => { basic.forever(() => {
@ -20,7 +54,7 @@ basic.forever(() => {
``` ```
### ~ ## 4.
We want to register code to run when a packet is received over radio. We can implement this code by adding `on data received`. We want to register code to run when a packet is received over radio. We can implement this code by adding `on data received`.
```blocks ```blocks
@ -31,7 +65,8 @@ radio.onDataReceived(() => {
}) })
``` ```
### ~ ## 5.
Finally, we want to chart the acceleration. So we must first implement `plot bar graph`. `Plot Bar Graph` will display a vertical bar graph based on the value and high value. In order to transfer the receive the number from the 1st micro:bit, we must implement `receive number` to constantly display a vertical bar graph based on the value. Remember, the value will equal to the micro:bit's acceleration in the "x" direction. Finally, we want to chart the acceleration. So we must first implement `plot bar graph`. `Plot Bar Graph` will display a vertical bar graph based on the value and high value. In order to transfer the receive the number from the 1st micro:bit, we must implement `receive number` to constantly display a vertical bar graph based on the value. Remember, the value will equal to the micro:bit's acceleration in the "x" direction.
```blocks ```blocks
@ -43,7 +78,8 @@ radio.onDataReceived(() => {
}) })
``` ```
### ~
## 6.
Notice that moving the micro:bit the farthest direction in the x direction will be -1023 on the charting beneath the simulator. The second observation will be that the LEDs will be full brightness on the 2nd micro:bit. There is a single LED turned on with the 1st micro:bit. Additionally, the graphs will reflect 0 acceleation for the 1st micro:bit. In this scenario, if you are adjusting the acceleration in the simualator, you are also changing your chart that will be produced. Notice that moving the micro:bit the farthest direction in the x direction will be -1023 on the charting beneath the simulator. The second observation will be that the LEDs will be full brightness on the 2nd micro:bit. There is a single LED turned on with the 1st micro:bit. Additionally, the graphs will reflect 0 acceleation for the 1st micro:bit. In this scenario, if you are adjusting the acceleration in the simualator, you are also changing your chart that will be produced.
![](/static/mb/acc.png) ![](/static/mb/acc.png)