17. Case16: Here Comes the Police¶
Simulate the lights of the police car.
17.3. Hardware connection¶
Connect rainbow led to port 1 on TPBot.
Click “Advanced” to see more choices in the MakeCode drawer.
We need to add a package for programming. Click “Extensions” in the bottom of the drawer and search with “tpbot” in the dialogue box to download it.
We need to add a package for programming. Click “Extensions” in the bottom of the drawer and seach with “PlanetX” in the dialogue box to download it.
In on start brick, initialize the led strip and has it connected to J1 port, set TPBot move forward at the speed of 50%.
Save the variable “i” as 1 while pressing button A and set it as 0 while pressing button B.
In forever brick, judge if the variable “i” is 1, if yes, set the led in red and pasue for 500ms, after in blue and pause another 500ms; or set it in black.
The TPBot moves forward after powering on, press button A on the micro:bit to turn on the LED cycling with red and blue, press button B to turn it off.
Q: While operating this case, why the car might not work properly?
A: It might be the low power of the batteries, please try adding the value of TPBot’s speed and test again.