13. case 05 Crazy dance

13.1. Our Goal


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

13.2. Requiered Materials


  • 1 x Ring:bit Car

13.3. Hardware Connect


  • Connect the left wheel servo to P1 of the Ring:bit expansion board and the right wheel servo to P2. ../../_images/jBVHea8.png

13.4. Software


makecode

13.5. Coding


Step 1

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

../../_images/2qCyzQ71.png

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

../../_images/1Wq2Mov1.jpg

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. ../../_images/igG5TVD1.png

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.

../../_images/2PPYJ0T1.png

Step 4

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

  • Pause for one second.

../../_images/HSujBjF1.png

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


  • The car runs at different speed.

../../_images/j6kX56N1.jpg

13.7. Think


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

13.8. Questions


13.9. More Information