18. case 08 Light Follow¶

18.1. Our Goal¶

Make the ring:bit car to light follow.

18.2. Requiered Materials¶

1 x Ring:bit Car

18.3. 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

18.4. Software¶

makecode

18.5. 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 and initialize the P1 port to left wheel and the P2 port to right wheel.

../../_images/RFccHpJ1.png

Step 3¶

Snap the light level from the Input. The car will move to the light source when the light level is greater than the defined value.
The car will spin around to find the light source when the light level is less than the defined value.

../../_images/i1lAR3X1.png

Program¶

Program Link：https://makecode.microbit.org/_H7c7DPWTPYKY

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

18.6. Result¶

The car spins around and will move to the light source when it is detecting the light.