Make a sound machine lesson (#363)

docs/lessons/make-a-sound-machine.md

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+# Make a Sound Machine
+
+![Maker – Make a Sound Machine Main Image](/static/lessons/make-a-sound-machine/lego-maker-sound-machine-1.jpg)
+
+Make a Sound Machine that can play a rhythm, music or just noise!
+
+## Connect 
+
+Music is made up of a combination of sounds, notes and rhythm. A rhythm is a regular movement or repeated pattern of movements that can be used in many different ways. In mechanical machines, a rhythm can help keep a machine running smoothly. It can also be used to generate different sounds in music. 
+
+![Sound Machine 3 Stock Footage Images](/static/lessons/make-a-sound-machine/three-stock.jpg)
+
+Look at the photos and think about:
+
+* What do you see?
+* Can you see any new design opportunities?
+* What problems can you see?
+* How could you make use of the LEGO bricks, the EV3 Programmable Brick, motors, and sensors?
+
+### Things You’ll Need
+
+* [LEGO MINDSTORMS Education EV3 Core Set](https://education.lego.com/enus/products/legomindstormseducationev3coreset/5003400)
+
+Additional materials to add to your Sound Machine:
+
+* Small musical instruments, such as chimes, bells, and small drums
+* Arts and crafts materials such as:
+>* Cardboard
+>* Construction paper
+>* Pipe cleaners
+>* Plastic or paper cups 
+>* Recycled materials
+>* Rubber bands
+>* Wire
+
+### Prior Knowledge
+
+This activity uses motor rotations and sensor inputs. You may want to try the Use or Object Detection activity before this one. Or, you can start out with this activity and tinker with coding motor and sensor inputs on your own.
+
+### Defining the Problem
+
+![LEGO Education Maker Design Process](/static/lessons/make-a-sound-machine/lego-maker-sound-machine.jpg)
+
+1. What problems did you imagine? 
+2. Pick one problem and explain it to a partner.
+
+### Brainstorm
+
+Now that you have defined a problem, start to generate ideas for solving it. 
+
+### ~hint
+
+Some things to do while brainstorming:
+
+* Use the bricks from the LEGO set to help you brainstorm or sketch your ideas on paper.
+* The goal of brainstorming is to explore as many solutions as possible. You can use the tinkering examples in the Sample Solutions section below as inspiration for getting started.
+* Share your ideas and get some feedback. It may lead to more ideas!
+
+### ~
+
+### Define the Design Criteria
+
+* You should have generated a number of ideas. Now select the best one to make. 
+* Write out two or three specific design criteria your design must meet.
+
+## Go Make
+
+It is time to start making!
+* Use the components from the LEGO® MINDSTORMS EV3 Core Set and additional materials to make your chosen solution. 
+* Test and analyze your design as you go and record any improvements that you make. 
+
+Review and Revise Your Solution 
+* Have you managed to solve the problem that you defined? 
+* Look back at your design criteria. How well does your solution work? 
+* How can you improve your design?
+
+Communicate Your Solution 
+Now that you have finished you can:
+* Make a sketch or take a photo or video of your model.
+* Label the three most important parts and explain how they work.
+* Share your work with others.
+
+## Sample Solutions
+
+### Rhythm Maker
+
+![Sound Machine Tinkering Example #1](/static/lessons/make-a-sound-machine/lego-maker-sound-machine.jpg)
+
+This example program combined with the small model will make a beat and rhythm on any surface when the program is run.
+
+![Tinkering Example #1 Programming Blocks (see JavaScript below)](/static/lessons/make-a-sound-machine/lego-maker-sound-machine.jpg)
+
+1. Drag a run ``||motors:large motor A||`` block inside the ``||loops:forever||`` loop.
+2. Press the **(+)**.
+3. Change the rotations to `2`.
+4. Drag a ``||loops:pause||`` block and place it under the motor block.
+5. Change the duration to ``200`` ms.
+6. Drag a ``||run large motor A||`` block inside the ``||loops:forever||`` loop.
+7. Press the **(+)**.
+8. Change the power to `100`.
+9. Change the rotations to `1`.
+
+```blocks
+forever(function () {
+    motors.largeA.run(50, 2, MoveUnit.Rotations)
+    pause(200)
+    motors.largeA.run(100, 1, MoveUnit.Rotations)
+})
+```
+
+Click **Download** and follow the instructions to get your code onto your EV3 Brick. Press the ``center`` button on the EV3 Brick to run the program.
+
+### Color Sensor Sounds
+
+![Sound Machine Tinkering Example #1](/static/lessons/make-a-sound-machine/lego-maker-sound-machine.jpg)
+
+You can also tinker with the use of sensors.
+
+![Tinkering Example #2 Programming Blocks (see JavaScript below)](/static/lessons/make-a-sound-machine/lego-maker-sound-machine.jpg)
+
+1. Drag an ``||logic:if else||`` Logic block and place it inside the ``||loops:forever||`` loop.
+2. Drag a ``||sensors:pause color sensor||`` block and place it inside the ``||logic:if true then||`` block.
+3. Change the color to ``blue``.
+4. Drag a ``||music:play tone||`` block and place under the sensor block.
+5. Change the tone to ``Middle G`` (392 Hz).
+6. Drag a ``||sensors:pause color sensor||`` block and place it inside the ``||logic:else||`` block.
+7. Change the color to ``red``.
+8. Drag a ``||music:play tone||`` block and place under the new sensor block.
+9. Change the tone to ``High C`` (523 Hz).
+10. Press the **(+)**.
+11. Drag a ``||sensors:pause color sensor||`` block and place it inside the ``||logic:else if||`` block.
+12. Change the color to ``green``.
+13. Drag a ``||music:play tone||`` block and place under the new sensor block.
+14. Change the tone to ``High D`` (587 Hz).
+
+```blocks
+forever(function () {
+    if (true) {
+        sensors.color3.pauseForColor(ColorSensorColor.Blue)
+        music.playTone(392, music.beat(BeatFraction.Whole))
+    } else if (false) {
+        sensors.color3.pauseForColor(ColorSensorColor.Red)
+        music.playTone(523, music.beat(BeatFraction.Half))
+    } else {
+        sensors.color3.pauseForColor(ColorSensorColor.Green)
+        music.playTone(587, music.beat(BeatFraction.Half))
+    }
+})
+```
+
+Click **Download** and follow the instructions to get your code onto your EV3 Brick. Press the ``center`` button on the EV3 Brick to run the program.
+
+### Well done!
+
+Click [here](#) to try out some more projects!
+
+