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Case 07: Fall-arrest Cutebot

Purpose​

  • The Cutebot reverses quickly when detecting the edge of a table and goes forward after making a turn.

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` 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 start brick.

Step 3​

  • Drag if brick into forever brick and judge if both of the line-tracking sensors are detecting the edges of the black line, then set the right wheel speed to 20.
  • If not, set the speed of both wheels as -50 to reverse, pause 300ms and keep the left wheel still but the right wheel moves at a random speed from 50~100 and lasts 100ms.
  • Set the speed of both wheels to 0 and pause 1s to move forward again.

Programming​

Links: https://makecode.microbit.org/_2z1hh4iEUgTY

You can also download it directly below:

Result​

  • The Cutebot reverses quickly when detecting the edge of a table and goes forward after making a turn.

Exploration​

FAQ​

Relevant Files​