Microsoft Word - Model4Challenge.doc

Lego Wedo: Click on lego Wedo software on desktop

Tip to launch the programme

Use the green arrow pictogram.

Tip to stop a programme

Click on the red square.

Tip to program the duration (time)

Use the motor time pictogram and the 123 one. Place the cursor in the 123 box. When the letter T appears, type the number for the time you want.

Tip for the timeIf you want the robot to move for 1 second, type 1 and add a 0. If you want it to move 2 seconds, type 2 and add a 0. If you want it to move 3 seconds, you know what to type and to add.

Tip for the sound

Put together the music notes and the 123 pictograms. Place your cursor on 123. When the letter T appears, you can type a number. You can choose among 20 sounds: numbers 1 to 20.

Tip for the motion detector

On the grey brick, there are little eyes. The brick detects a movement and it reacts when you move an object in front of it or if you remove it.

Tip to program the motion sensor

Use the hour glass pictogram and the motion detector one (with the little eyes). This indicates wait until motion is sensed

Tip for the Repeat Block

To make the programme run continuously, use the repeat block.

Pictograms to use in the challenges

or

Note: It takes less than a second to open or close the alligator's jaws. If you program the motor for longer than 1 sec, it might put a strain on it.

Challenge 1 Open the jaws of the alligator by running the motor for 1 second. Tip: start with the jaws closed. *1 second =10

Challenge 2 a- Close the jaws of the alligator by running the motor for 1 second. Tip: start with the jaws opened.

b- Close the jaws of the alligator by running the motor for 1 second and make us hear the chewing sound when it is closed.Challenge 3a- Open the jaws of the alligator and the close them. Tip: put together the programs of challenge 2 and challenge 3.

b- Use the Repeat Block to make the alligator eat non- stop (1 second movements).

Challenge 5 a- Copy the following program.

b- Give the alligator some food. What happens? What noise does it make when it eats?

Lego Wedo: with Scratch 2.0 OnlineThe Lego WeDo Contruction set includes: USB hub or controller motor distance sensor tilt sensor

A tilt sensor can: control a game. http://youtu.be/GALM3WoaAJ0 drive a car http://youtu.be/Zo3JZHK8Cbw

A distance sensor can: trigger an alarm http://youtu.be/wCdJpp-CCQA

To get started:

1. Go to Scratch online login

2. Connect USB hub to computer with tilt sensor as in images.

3. Go to https://scratch.mit.edu/scratchr2/static/help/en/ui/extensions.html and choose install for windows and Run

4. Go to More Blocks under scripts tab and select Add an extension. Choose Lego WeDo. On your screen the light beside Lego Wedo needs to be green. The Scratch Lego Wedo blocks only work with the Lego plugged in.

Note: Tilt sensor determines orientation 0 flat, 1 is down, 2 is right, 3 is up and 4 is left. Distance sensor determines proximity where 0 is close and 100 is far.

Test the sensor https://scratch.mit.edu/projects/21401707/ Lego WeDo Test Project on Scratch

Plug the motor into the alligator again and plug USB hub into computer.

Lego Wedo Hungry Alligator

In Scratch, go to Hungry Alligator https://scratch.mit.edu/projects/63608914/#editor (the green light needs to be on next to Lego Wedo- check you have clicked More Blocks and Add an Extension. Hint: close any windows or tabs you have open that you do not need)

Put your hand in the mouth. Here is what should happen https://youtu.be/ovkAsdHp1jc See a screen shot of the code below.

Change the sound to meow and put your hand in the mouth.

Challenge 6

Go to Lego Wedo Hungry Alligator Simulation Starter. https://scratch.mit.edu/projects/45245528/#editor

Click Remix top right. Share to our Studio. Put in a background.

Write a program so that when an actual Lego man moves near to your plastic alligator, your actual plastic Lego alligator starts to bite! And as well the lego picture on your screen, also gets eaten.Hints: You could use the code above as the base. You can walk a man (or your hand) towards the lego plastic crocodile to cause it to s. Then you need to write script so that when the crocodile opens its mouth, the man moves on your screen as well.

If you finish early, try and make some other programs using Lego Wedo with either Scratch or the Lego Wedo software.4