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update seismograph

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Michael Elliot Braun 2016-04-28 17:02:33 -07:00
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docs/lessons/seismograph/activity.md
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@ -10,9 +10,8 @@ In this project, you will build your own seismograph.
* USB cable
* Scissors
* Glue gun
* Cup (Plastic or Paper)
* Plate (Plastic or paper)
* String
* Cup (Plastic or Paper)
* Magnet
Welcome! This activity will teach how to use the micro:bit to chart the strength of the acceleration. Let's get started!
@ -21,17 +20,33 @@ Welcome! This activity will teach how to use the micro:bit to chart the strength
2. Fasten Magnet: Fasten end of the string to the magnet with glue
3. Secure String: Use string to cut a usable window on the cup, which will be a square sized hole at the lid side of the cup. Use scissors to create a small hole in the center of the base of the cup.
3. Secure String: Fasten string to base of the cup and hang the remaining string outside the base of the cup.
### ~avatar avatar
Seismograph built, let's code!
### ~
Let's measure `acceleration (mg)` in terms of strength. Get the acceleration value (milli g-force), as measured in strength.
4. Go to Codemicrobit.com
Click or tap Create Code
Click or tap Block Editor
### ~
5.
We will measure `acceleration (mg)` in terms of strength. Get the acceleration value (milli g-force), as measured in strength.
```blocks
input.acceleration(Dimension.Strength);
```
### ~
6.
Use the plot bar chart to visualize the acceleration on the LED screen of the micro:bit in the specified range. You implement plot Bar Graph to display a vertical bar graph based on the "value" and "high" value. Then you must insert acceleration in based on strength.
```blocks
@ -42,6 +57,9 @@ basic.forever(() => {
```
### ~
7.
Finally, we subtract the gravity from acceleration strength.
```blocks
@ -52,18 +70,27 @@ basic.forever(() => {
```
### ~
8.
Notice that making vibrating the object below the micro:bit changes the values and the line appears as a wave to display the value of the strength as measured in milli-gravities. By making the object below the micro:bit vibrate, you will observe changing values of the micro:bit. Also, the LEDs shown on the Bar Graph fluctates based on the movement of the micro:bit strength.
NOTE: The black color reflects the micro:bit device.
![](/static/mb/data4.png)
### ~
9.
Vigorously move the micro:bit in the micro:bit simulatator by moving the micro:bit image from side to side. Every time the micro:bit moves in the x direction in the simulator, you are generating data points that can be reviewed in Excel. The more attempts to move the micro:bit from side to side, the more data being saved in Excel. After you have vigarously moved the micro:bit simulator from side to side for a sufficient amount of time, you are ready to graph or chart the accceleration of the micro:bit. We want a printout of our acceleration on Excel that can be graphed in Excel.
### ~
10.
We want to chart the data collected by using a tool in Excel.
The final part of this experiment is opening and reviewing the data in the Excel CSV file. Simply click on the line beneath the simulator. A CSV file will be generated to display the data points collected by moving the micro:bit in the X direction. Then click or tap on the data Excel file that was downloaded to your local Downloads Folder.
@ -71,6 +98,8 @@ The final part of this experiment is opening and reviewing the data in the Excel
### ~
10.
First, click or tap on the first two columns (A, B) to include the time of the data being collected; b) the results of acceleration data on the micro:bit
@ -82,6 +111,11 @@ Use the Recommended Charts command on the Insert tab to quickly create a chart t
* Click Insert > Recommended Charts.
### ~
11.
![](/static/mb/chart1.png)
* On the Recommended Charts tab, scroll through the list of chart types that Excel recommends for your data.
@ -92,10 +126,18 @@ When you find the chart type that you want, click it, and then click OK. We want
Tip: If you don’t see a chart type that you want, click the All Charts tab to see all of the available chart types.
### ~
12.
![](/static/mb/chart_title.png)
* Use the Chart Elements, Chart Styles, and Chart Filters buttons next to the upper-right corner of the chart to add chart elements like axis titles or data labels, to customize the look of your chart
### ~
13.
![](/static/mb/elements_styles_filters.png)
* Connect a micro:bit to your computer using your USB cable; compile; and repeat this experiment by vibrating the micro:bit. Then chart the data on Excel.