9. Case 07: Fall-arrest Cutebot

9.1. Purpose

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

9.2. Materials

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• 1 x Cutebot Kit

9.3. Software Platform

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MicroSoft makecode

9.4. Programming

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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/_LvweWCb3J72u

You can also download it directly below:

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9.5. Result

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

9.6. Exploration

9.7. FAQ

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9.8. Relevant Files

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