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Case 08: Run Along the Black Line

Purpose​

  • The Cutebot runs along the black line.

Materials​

Software Platform​

MicroSoft makecode

Programming​

Step 1​

  • Click the "Advanced" to see more choices in the MakeCode drawer.

  • A codebase is required for Cutebot programming, click “Add Package” at the bottom of the drawer, search [Cutebot](https://www.elecfreaks.com/micro-bit-smart-cutebot.html) in the dialogue box and download it.

Note: If you met a tip indicating incompatibility of the codebase, you can continue with the tips or build a new project there.

Step 2​

  • Choose "show icon" in the On startbrick.

Step 3​

  • Drag three if bricks into the Forever brick.
  • Judge if the status of line-tracking sensors is ○ ●, saying the left probe doesn't detect the black line while the right probe detects the black line.
  • Set the left wheel speed to 50 and right to 25, make a right turn by the different speed of the two wheels and go back to the black line.
  • Judge if the status of line-tracking sensors is ● ○ and make a left turn to go back to the black line.
  • When the status is ● ● that means the Cutebot runs along with the black line at the speed of 50.

Programming​

Links: https://makecode.microbit.org/_1A0PqrDTDTp3

You can also download it directly below:

Result​

  • The Cutebot runs along the black line and will adjust to run back to the black line if any deviation happens.

Exploration​

  • How to program to make the Cutebot run in the white background of the map excluding the black line circle part?

FAQ​

Relevant Files​