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Activity: Let’s build a ball shooter using LEGO NXT
• This activity assumes that the lesson ‘What is a robot?’ has already been covered. This activity takes 50 mins.
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INSTRUCTIONS TO ASSEMBLE THE BALL SHOOTER
• Follow the link below for building instructions. http://www.nxtprograms.com/NXT2/ball_shooter/steps.html
The instructions have also been provided at the end of this PowerPoint, starting at slide 4.
• You can also watch the following ½ minute video to see what
you’ll be building: http://www.youtube.com/watch?v=_k8bqWySzk4
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STUDENT ACTIVITY SHEET – to be handed out to the students prior to the activity. Students fill this as they complete the activity. The answers are to be discussed after the entire activity.
• What happens when you turn the system on by pressing the enter button on the NXT brick?
• Why does this happen?
• Is there any similarity between this and how you throw a
ball using your hand? Explain it clearly.
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Attachment: Instructions for building and programming the NXT Ball Shooter – follows starting slide 5
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1. INSTRUCTIONS FOR BUILDING LEGO NXT BALL SHOOTER 2. PROGRAMMING INSTRUCTIONS FOR BALL SHOOTER ACTIVITY
Adapted with permission from the website http://www.nxtprograms.com/NXT2/ball_shooter/steps.html
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BUILDING: STEP 1
• What you need:
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STEP 1 contd…….
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BUILDING: STEP 2
• What you need:
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STEP 2 contd……
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BUILDING: STEP 3
• What you need:
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STEP 3 contd…..
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BUILDING: STEP 4
• What you need:
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STEP 4 contd…….
Connect this to one of the ports of the NXT brick
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PROGRAMMING -NXT PROGRAM
Computational Neurobiology Center, University of Missouri
• Build NXT program as illustrated in the figure. Download and run the program after building the ball shooter.
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PROGRAMMING - Step 1
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Settings
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PROGRAMMING - Step 2
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Settings
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PROGRAMMING - Step 3
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PROGRAMMING - Step 4
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Settings
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PROGRAMMING - Step 5
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Step 5 contd….
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Settings
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STUDENT ACTIVITY SHEET ANSWERS
• What happens when you press the enter button on the NXT brick?
The balls in the ring are shot out one after the other.
• Why does this happen? The NXT motor moves forward and every time it moves it also pushes the
balls out with a force. • Is there any similarity between this and how you throw a ball using your
hand? The muscle in your arm is like the ‘motor’. Muscles use glucose energy to
help your arm to move and throw the ball.
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