9. case 01 Full speed ahead¶

9.1. Our Goal¶

To make the Ring:bit Car to go ahead and reverse.

9.2. Requiered Materials¶

1 x Ring:bit Car

9.3. 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

9.4. Software¶

makecode

9.5. 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 go straight at full speed into the On start block.
The port number is based on the actual servo connection port.

Step 3¶

Snap the go straight at full speed block into the on button A pressed block.

../../_images/Wyo2R9B.png

Step 4¶

Snap the reverse at full speed block into the on button B pressed block.

../../_images/jHFkpm1.png

Program¶

Program Link：https://makecode.microbit.org/_5md9ofDyRigh

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

---

9.6. Completed!¶

When button A is pressed, the car will go straight at full speed.
When button B is pressed, the car will reverse at full speed.

9.7. Think¶

How can you make your car to stop when button A is pressed ?