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case 04 Here comes the police

Our Goal​

  • To change the Ring:bit car to a police car.

Requiered Materials​

Hardware Connect​

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

  • Connect the ring:bit car special expansion board to the P0.

  • Slide the clip switch of the special expansion board to the Rainbow LED.

Software​

makecode

Coding​

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.
  • Go straight at full speed.
  • Set the 2 Rainbow LED of the P0 to RGB color.

Step 3​

  • Within the forever block, snap below blocks in line:
  • show color red block.
  • pause(ms) 100 block.
  • show color blue block.
  • pause(ms) 100 block.

Program​

Program Link：https://makecode.microbit.org/_AvMC6j86A5ym

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

Result​

  • The car goes straigt at full speed at red and blue flash.

Think​

  • How can you make youe car at yellow and white flash?

Questions​

More Information​