62 lines
2.9 KiB
Markdown
62 lines
2.9 KiB
Markdown
# Charting Acceleration: Activity
|
|
|
|
Measure the acceleration on the micro:bit in the "x" direction.
|
|
|
|
### ~avatar avatar
|
|
|
|
Welcome! This activity will teach how to use the micro:bit to chart the acceleration in the "x" direction. Let's get started!
|
|
|
|
|
|
### ~
|
|
Let's measure `acceleration (mg)` in the "x" direction. Get the acceleration value (milli g-force), in one of three specified dimensions.
|
|
|
|
|
|
```blocks
|
|
input.acceleration(Dimension.X)
|
|
|
|
```
|
|
|
|
### ~
|
|
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 the X dimension to measure the acceleration.
|
|
|
|
```blocks
|
|
basic.forever(() => {
|
|
led.plotBarGraph(input.acceleration(Dimension.X), 0)
|
|
})
|
|
|
|
```
|
|
|
|
### ~
|
|
Notice that moving the micro:bit in the simulator from left to right (x direction) changes the values beneath the micro:bit in a range from 1023 to -1023 as measured in milli-gravities. By hovering over the micro:bit from left to right, you can observe changing values beneath the micro:bit simulator. Also, the LEDs shown on the Bar Graph fluctates based on the movement of the micro:bit simulator in the x direction. The line underneath the micro:bit simulator reflect the acceleration in the x direction.
|
|
|
|
NOTE: The colors of the charts reflect the color of the micro:bit simulator. In this instance, the micro:bit is yellow. So the color of the data line reflects the color of the micro:bit
|
|
|
|
|
|
|
|
### ~
|
|
|
|
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.
|
|
|
|
### ~
|
|
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.
|
|
|
|
|
|
|
|
### ~
|
|
|
|
Review and write down your observations from the Excel data.
|
|
|
|
|
|
|
|
* Chart the data collected by using a graph in Excel
|
|
* Connect a micro:bit to your computer using your USB cable; compile; and move the micro:bit in the "x" direction.
|
|
* Review and analyze the actual micro:bit device data on Excel
|
|
|
|
|
|
### ~avatar avatar
|
|
|
|
Excellent, you're ready to continue with the [challenges](/lessons/charting/acceleration-challenge)
|
|
|
|
### ~
|
|
|