Coding Ireland STEM Report 2024 Have Your Say
30 mins
155 points
What you need:
  • Microbit
  • USB Cable
  • LED Strip with crocodile clips

Microbit LED Strip Thermometer

Let's turn a LED strip into a visual thermometer by lighting up and colouring it's lights depending on the current temperature.

1 - Create a new Microbit project

To get started create a new Microbit project.

2 - Add the neopixel extension

To access the blocks we need to program the LED strip, you need to add the neopixel extension to your project.

3 - Setup the LED Strip

To be able to interact and program the LED strip we will need a variable that stores the strip.

Add the following code to your project. We set the value to be 30 as there are 30 LEDs on the strip.

4 - Show the temperature

Now let's program the A button to display the temperature on the screen of the Microbit.

Add the following code to your project:

5 - Light up the LED lights

Finally let's display the temperature by lighting up the LED lights on the strip. The hotter it is the more lights we want to light up.

We will use the show bar graph block and a temperature block to light up the LEDs on the strip according to what temperature the Microbit is reading from it's sensor. We will set the maximum temperature to be 30 degrees celsius (if it's 30 degrees then all the lights will light up).

Add the following new code to your project:

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