Follow a Line and Return (Hint)

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Action: Follow a line using one light sensor. When the robot bumps into something, turn around and return along the line.

Robot: Light sensor in the front pointing down and connected to input 2. Touch sensor attached to a front bumper and connected to input 1.

Reading the program

• Begin the program
• Begin a loop (red land)
• Read the light sensor connected to input 2
  • If the value read is greater than 40:
    • (Turn left) - your code here
  • If the value read is less than or equal to 40:
    • (Turn right) - your code here
• Merge
• Read the touch sensor connected to input 1
  • If it is pushed in:
    • (Back up, turn around) - your code here
  • If it is not pushed in:
    • Continue to the next step
• Merge
• Loop to the red land (red jump)
• End the program

Where to find it

Touch Sensor Fork: click Structures then Forks on the functions palette.

For more information: See the Follow a Line tutorial or Context Help in RoboLab.