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Milk Monster

Milk Monster

Make a funny milky-monster robot!

https://youtu.be/egl3fNAYylk

Duration

3 activities, approx 30-45 min each based on familiarity with the coding concepts

Materials

Recycled

  • 1 Milk Carton (with a screwable top cap)
  • 1 Small cord recycle string from a used tea bag
  • 1 Paper clip

Electronics

  • 1 micro:bit, battery holder and 2 AAA batteries
  • 3 Crocodile clips
  • 1 micro servo 9g SG90
  • 1 servo clip designed for Milky Monster, download at thingiverse (optional). Teachers may prefer to download the classroom pack (16 servo clips).

Tools

  • Small knife and scissors that can cut cardboard
  • Tape (masking, duct tape, and/or packing tape)
  • Glue gun

Preparation

  • Equip the micro servo with crocodile clips
  • Get the cutout template
  • Download and 3D-print the servo clip designed for Milky Monster from thingiverse (this is optional). Teachers may prefer to download the classroom pack (16 servo clips).

Activities

Make

Turn a drink carton into an milky-monster!

Duration: ~45 minutes

Materials

Recycled

  • 1 Milk Carton (with a screwable top cap)
  • 1 Small cord recycle string from a used tea bag
  • 1 Paper clip

Electronics

  • 1 micro:bit, battery holder and 2 AAA batteries
  • 3 Crocodile clips
  • 1 micro servo 9g SG90
  • 1 servo clip designed for Milky Monster, download at thingiverse (optional). Teachers may prefer to download the classroom pack (16 servo clips).

Tools

  • Small knife and scissors that can cut cardboard
  • Tape (masking, duct tape, and/or packing tape)
  • Glue gun

Step 1: Download and cut the template

Download the template and cut out the template.

https://youtu.be/ipsZuFNgTHM

Step 2: Glue the template onto the milk carton

Glue the template on the milk carton.

https://youtu.be/2D3WFp29QC4

Step 3: Cut carton

Cut the carton (watch the fingers!)

https://youtu.be/pvC3Tnhe5QU

Step 4: Create the mouth

Cut the cardboard halfway and fold the corners. This forms the mouth of the Milky Monster.

https://youtu.be/Yyk1zW4sFoM

Step 5: Extend the mouth

Use tape to extend the mouth approx 1 cm. Fold one after the other.

https://youtu.be/RWJbqI03wPE

Step 6: Connect cord

Using scissors, create a small whole to insert the cord. Tape the cord on the back side of the mouth.

Once finished position the mouth in upward position and fix the cord between the cap.

https://youtu.be/Qyndcsmt0AU

Step 7: Create space for micro:bit

Use scissors to create space at the bottom of the Milky Monster to attach the micro:bit.

https://youtu.be/3FUNI0GSbNc

Step 8: Create space for cables

Create space to route the cables nicely on back of the milky-monster.

https://youtu.be/BoIRCk769MM

Step 9: Attaching clip to servo

Use a philips screw driver to mount the servo to the 3D-printed servo clip. If you don’t have the 3D-printed clips available, download on thingiverse, or fix the servo using tie wraps or a glue gun.

https://youtu.be/drKzo5zqvuI

Step 10: Attaching servo to milk button

Glue servo to the cap of the milk carton.

https://youtu.be/Ch_vU5LXPeM

Step 11: Cut out a hole in cap

Cut out a hole in the cap to guide the string to the servo.

https://youtu.be/JKi2Ns8y3nI

Step 12: Connect crocodile clips

Connect the crocodile clips to the servo.

https://youtu.be/RiQE-9z9LrI

It’s ready!

Your milky-monster is ready, it is time to decorate it! Customize the milky monster to your taste!

Code

Add code to make the Milky Monster move. Duration: ~30 minutes

Step 1: Calibrate servo

In order for the Milky Monster to move, the micro:bit needs to command the servo to go between 0 and 180 degrees at a certain pace. In the code below:

  • Press button A to switch the servo to 180 degrees (to close the mouth of Milky Monster).
  • Press button B to switch the servo to 0 degrees (to open the mouth of Milky Monster).

Step 2: Attach rotor

The servo should be positioned at 180 degrees before attaching the rotor to it. This will make sure the mouth of the Milky Monster is closed once the servo reaches 180 degrees. You can use a philips screw driver to attach the rotor to the servo.

https://youtu.be/YZfkMWTeH4o

Step 3: Check calibration

When the user presses A the servo rotor should be in ‘up’ position.

https://youtu.be/bAqXEawUsSM

Step 4: Connect cord to rotor

Connect the cord to the servo rotor while mouth of Milky Monster is closed.

https://youtu.be/AWsnwk_iA_A

Step 5: Connect cables to micro:bit

Connect cables from micro:bit to the servo and place the battery.

https://youtu.be/fAR58GJUZdM

Step 6: Code light sensor

Code the light sensor on the micro:bit to control the servo.

Step 6: Ready!

Your Milky Monster is ready!

https://youtu.be/egl3fNAYylk

Connect

Remotely control your Milky Monster with another micro:bit. Duration: ~30 minutes You will need a second micro:bit for this part. By using the radio, we can control the Milky Monster with another micro:bit. Download the code below to the micro:bit that’s on the Milky Monster and again to another “controller” micro:bit. Whenever button A is pressed, the Milky Monster will move one time.

Link: https://makecode.microbit.org/_R27DMoELcJpD