8. case 05 Crazy dance#

8.1. Our Goal#

  • To make the Ring:bit car to dance in free style. ../../_images/j6kX56N.jpg

8.2. Requiered Materials#

  • 1 x Ring:bit Car

8.3. Hardware Connect#

  • Connect the left wheel servo to P1 of the Ring:bit expansion board and the right wheel servo to P2（as below picture) ../../_images/MT6Y00d.png

8.4. Software#

makecode

8.5. Coding#

Step 1#

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

../../_images/2qCyzQ7.png

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

../../_images/1Wq2Mov.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/igG5TVD.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/2PPYJ0T.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/HSujBjF.png

Program#

Program Link：https://makecode.microbit.org/_PXXfa8FF5MWs

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

8.6. Result#

  • The car runs at different speed.

../../_images/XAdHc64.gif

8.7. Think#

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

8.8. Questions#

8.9. More Information#