13. case 05 Crazy dance

13.1. Our Goal

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• To make the Ring:bit car to dance in free style.

13.2. Requiered Materials

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• 1 x Ring:bit Car

13.3. Hardware Connect

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• Connect the left wheel servo to P1 of the Ring:bit expansion board and the right wheel servo to P2.

13.4. Software

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makecode

13.5. Coding

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Step 1

• Click on “Advanced” in the MakeCode Drawer to see more code sections.

• Search for “ringbitcar” and click on the ring:bit car package to add it to your project. (As below picture)

Note：If you get a warning telling you some packages will be removed because of incompatibility issues, either follow the prompts or create a new project in the Project file menu.

Step 2

• Snap the block set left wheel at pin P1 right wheel at pin P2 to the On start block.

• The port number is based on the actual servo connection port.

Step 3

• Snap blocks into forever block.

• Set an varieble to left and an variable to right.

• Generate a random number and assinment to the left and the right.

Step 4

• Set the left wheel speed to the variable left abd the right wheel speed to the variable right.

• Pause for one second.

Program

Program Link：https://makecode.microbit.org/_WrC1kWhizc6E

If you don’t want to type these code by yourself, you can directly download the whole program from the link below:

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13.6. Result

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• The car runs at different speed.

13.7. Think

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• How do you ensure the car moves at a slower speed constantly?

13.8. Questions

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13.9. More Information

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