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docs/lessons/seismograph.md

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+# Seismograph Lesson 
+
+Build a seismograph with household materials
+
+## Topic 
+
+Acceleration & Analog Read Pin
+
+## Quick Links
+
+* [activity](/lessons/seismograph/activity)
+* [challenge](/lessons/seismograph/challenges)
+
+## Prior learning/place of lesson in scheme of work 
+
+Learn how to **show LEDs** to turn on a LED light pattern on the LED screen. We will be learning basic comments such as show LEDs and pause.
+
+## Documentation
+
+```cards
+basic.forever(() => {
+});
+led.plotBarGraph(input.acceleration(Dimension.Strength) - 1023, 0);
+led.plotBarGraph(pins.analogReadPin(AnalogPin.P0), 0);
+
+```
+
+## Objectives
+
+* learn how to repeat code forever in the background
+* learn how to display a vertical bar graph based on the value. 
+* learn how to return the sum of the two numbers
+* learn how to get acceleration value in milli-gravitys 
+* learn how to read the connector value as analog as a value comprised between 0 and 1023

docs/lessons/seismograph/activity.md

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+# Seismograph Activity 
+
+### ~avatar avatar
+
+In this project, you will build your own seismograph. 
+
+## What you'll need: 
+
+* micro:bit 
+* USB cable
+* Scissors
+* Glue gun
+* Cup (Plastic or Paper)
+* Plate (Plastic or paper)
+* String
+* Magnet
+
+Welcome! This activity will teach how to use the micro:bit to chart the strength of the acceleration. Let's get started!
+
+1. Setup Cup: Use scissors 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. 
+
+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. 
+
+
+### ~
+Let's measure `acceleration (mg)` in terms of strength. Get the acceleration value (milli g-force), as measured in strength.
+
+```blocks
+input.acceleration(Dimension.Strength);
+```
+
+### ~
+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
+basic.forever(() => {
+    led.plotBarGraph(input.acceleration(Dimension.Strength), 0);
+});
+
+```
+
+### ~
+Finally, we subtract the gravity from acceleration strength. 
+
+```blocks
+basic.forever(() => {
+    led.plotBarGraph(input.acceleration(Dimension.Strength) - 1023, 0);
+});
+
+```
+
+### ~
+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)
+
+### ~
+ 
+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. 
+
+### ~
+
+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. 
+
+
+### ~
+
+
+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  
+
+![](/static/mb/data7.png)
+
+Use the Recommended Charts command on the Insert tab to quickly create a chart that’s just right for your data.
+
+* Select the data that you want to include in your chart.
+
+* Click Insert > Recommended Charts.
+
+![](/static/mb/chart1.png)
+
+* On the Recommended Charts tab, scroll through the list of chart types that Excel recommends for your data.
+
+Click any chart type to see how your data will look in that format. 
+
+When you find the chart type that you want, click it, and then click OK. We want to select the chart called Line. A line chart is used to display trends over time. We will use the line chart because there are many data points over time. 
+
+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.
+
+![](/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
+
+![](/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. 
+
+### ~avatar avatar
+
+Excellent, you're ready to continue with the [challenges](/lessons/seismograph/challenge)
+
+### ~
+

docs/lessons/seismograph/challenge.md

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+# Challenge 
+
+### ~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!
+
+### ~
+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.
+
+```blocks
+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.
+
+```blocks
+basic.forever(() => {
+    radio.sendNumber(input.acceleration(Dimension.X));
+});
+
+
+```
+### ~
+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
+basic.forever(() => {
+    radio.sendNumber(input.acceleration(Dimension.X))
+})
+radio.onDataReceived(() => {
+    
+})
+```
+### ~
+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
+basic.forever(() => {
+    radio.sendNumber(input.acceleration(Dimension.X))
+})
+radio.onDataReceived(() => {
+    led.plotBarGraph(radio.receiveNumber(), 1023)
+})
+
+```
+### ~
+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)
+
+### ~
+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)
+
+Use the Recommended Charts command on the Insert tab to quickly create a chart that’s just right for your data.
+
+* Select the data that you want to include in your chart.
+
+* Click Insert > Recommended Charts.
+
+![](/static/mb/chart1.png)
+
+* On the Recommended Charts tab, scroll through the list of chart types that Excel recommends for your data.
+
+Click any chart type to see how your data will look in that format. 
+
+When you find the chart type that you want, click it, and then click OK. We want to select the chart called Line. A line chart is used to display trends over time. We will use the line chart because there are many data points over time. 
+
+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.
+
+![](/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
+
+![](/static/mb/elements_styles_filters.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.
+* Connect the second micro:bit to your computer using your USB cable and run the charting script on it.
+* The first person and second person take turns tilting the micro:bit in the "x" direction while the other player charts the data on the micro:bit!
+* Review and analyze the actual micro:bit device acceleration data on Excel
+* Display acceleration with y or z using plot bar graph by changing acceleration from "x" to "y" or "z" 
+