Build the Scooter. All of the Scooter instructions should be printed (if possible) in color to clearly see the pieces in the diagrams.

Scooter Instructions - .pdf format

• Program the robot to drive forward for 3 seconds and stop
• Subroutines
  • RoboLab 2.0 (Subroutines): To show Subroutines, you must Install Extras: From
    Inventor Level 4 go to the Program menu and choose Install(Remove) Extras. After
    restarting the program, Subroutines are available from the Functions palette.
    Subroutines are numbered, not named. To learn about subroutines, go to the Help
    menu, choose Show Help, and point the mouse at a Create Subroutine block and a
    Run Subroutine block (see blocks to the right).
• Program the robot to drive forward 24 inches and stop
• Program the robot to turn to the right 90 degrees and stop
• Program the robot to drive forward for 24 inches and then turn to the right 90 degrees
• Program the robot to drive in a square, returning to the spot it started from

• Add a light sensor to the Scooter
  Install the light sensor so it is:
  • Pointing towards the table
  • Only a few centimeters from the table
  • Shielded from light from above
  • Forward of the point between the wheels or treads where the robot pivots
    For the FIRST Place Scooter, complete the Light Sensor Addition Instructions
• Use the black View button to measure the value of the lines and the background
  To make the View button work:
  • Download a program with a light sensor block set to the correct port (1, 2, or 3) to the RCX (even if the program doesn’t do anything!).
  • Push the green Run button twice.
  • Push the View button until the arrow on the RCX screen points to the port to which your light sensor is attached.
    Note: If you ever use a different light sensor, or the lighting in the room changes, you will need to measure again.
• Program the robot until it reaches a dark line, and have it stop on the line.
  Use a value a few percentage points higher (lighter) than what you measured for the line. For example, if the line measures 52, use <54 in your program.
• Program the robot to, in order:
  • Drive forward until it reaches a line
  • Turn 90 degrees to the left
  • Drive forward for 24 inches and stop
  • Program the robot to follow the line on the table, including a curve in the line.
    Use the same rule of thumb for measurements here: if the line measures 52 and the table 60, use <54 for the line and >58 for the table. You will need to repeat or loop within this program.
    Hint: It is possible to follow in and out one edge of the line. Make the robot turn on only one motor and turn the other off when it sees dark, and the opposite when it sees light.

• Add a touch sensor to the robot
  The touch sensor must have a lever or sliding piece to activate it. This piece allows the touch sensor to be pushed from anywhere in front or even to the side of the robot. For the FIRST Place Scooter, complete the Touch Sensor Addition Instructions
• Program the robot to drive until it bumps a wall or an obstacle, then have it stop
• Program the robot to drive until it bumps a wall, then have it back up a short distance, turn around 180 degrees, and drive forward again
• Program the robot to follow the edge of a wall using a side wheel on the touch sensor attachment