13. case 03 Turn at an angle

13.1. Our Goal

• To make the Ring:bit Car draw a circle in the clockwise direction.

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.

• Use a rubber band to fix a pencil on the base board of the Ring:bit car.

13.4. Software

makecode

13.5. 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 into the on start block.
• The port number is based on the actual servo connection port.

Step 3

• Snap the set left wheel speed right wheel speed block into the on button A pressed block.
• Set the left wheel’s speed to 10 and the right to 50.

Step 4

• Snap the brake block into the on button B pressed block.

Program

Program Link：https://makecode.microbit.org/_YejCA2AJDDVV

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

13.6. Result

• On button A pressed, the car draws a circle.
• On button B pressed, stop car.

13.7. Think

• How can you make your car draw an eight?

13.8. Questions

13.9. More Information