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:

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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?