16. case 07 Turns over Detection

16.1. Our Goal

Make the car to stop when it turns over.

16.2. Requiered Materials

1 x Ring:bit Car

16.3. 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

16.4. Software

makecode

16.5. 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 on start block from the Basic. Set RainbowLED with 24 leds in RGB format for colorful light and show rainbow from 1 to 360. Then, initialize the P1 port to left wheel and the P2 port to right wheel.

! ../../_images/tBTItKu.png

Step 3

Set a variable to state for controlling car’s running. Then set state variable unber the logo up block to true and the other to false.

../../_images/wjmku1o1.png

Step 4

Set the rainblw led to colorful lights under the forever loop in gradual change. Use the variable state to control car’s running.

Program

Program Link：https://makecode.microbit.org/_asoLxTRz4Dg2

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

16.6. Result

The car runs normally，when it turns over, it stops.

../../_images/buZmNej.gif

16.7. Think

How can you design more funny project using other kits?