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acc update

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Michael Elliot Braun 2016-04-25 15:14:01 -07:00
parent 090e530ff0
commit d3080d2e66
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docs/lessons/charting/acceleration.md
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@ -4,7 +4,7 @@ Measure the acceleration on the micro:bit in the "x" direction.
### ~avatar avatar ### ~avatar avatar
Welcome! This activity will teach how to use the 1st micro:bit to chart the second micro:bit's acceleration in the "x" direction. Let's get started! Welcome! This activity will teach how to use the micro:bit to chart the second micro:bit's acceleration in the "x" direction. Let's get started!
### ~ ### ~
@ -17,10 +17,43 @@ input.acceleration(Dimension.X)
``` ```
### ~ ### ~
Use the plot bar chart to visual the acceleration on the LED screen. When the micro:bit is laying flat with the screen up, x=0, y=0 and z=-1023.
```blocks ```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) will change 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 the values change beneath the micro:bit simulator. The second observation will be that the LEDs 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)
### ~
NOTE: The colors of the charts reflect the color of the micro:bit simulator. In this instance, the micro:bits are blue and green. So the colors of the line graphs reflect the colors of the micro:bit
### ~
After running this simulatation several seconds by moving the micro:bit side to side in the x direction, you are ready to graph or chart the accceleration of the micro:bit. We want a printout of our acceleration on Excel. We will graph the fluctuating acceleration of the simulation experiment.
![](/static/mb/acc2.png)
### ~
Finally, you must open the Excel CSV file by clicking on the data.xls file that was downloaded to Downloads Folder.
![](/static/mb/data3.png)
### ~
Have fun reviewing your simulation and analyze the acceleration by chart the Excel data using Excel.
* Connect the first micro:bit to your computer using your USB cable and run the charting script on it.
### ~avatar avatar
Welcome! The activity will teach you how to use the acceleration of the 1st micro:bit and return the acceleration value in a visual graphing display using the 2nd micro:bit. Let's get started!
### ~ ### ~
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.