14. case 05 Crazy dance

14.1. Our Goal

---

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

14.2. Requiered Materials

---

• 1 x Ring:bit Car

14.3. Hardware Connect

---

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

14.4. Software

---

makecode

14.5. 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 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:

---

14.6. Result

---

• The car runs at different speed.

14.7. Think

---

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

14.8. Questions

---

14.9. More Information

---