Introduction
Connect a potentiometer to a Bit Board and control the micro:bit's built-in LED matrix.
We'll explore how we can use a potentiometer as an input for the micro:bit
Video Overview
Featured Document
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We'll use Maker Tape to connect the Potentiometer to the Bit Board on a LEGO baseplate.
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We'll need to connect one side of the Potentiometer to Ground (GND) and the other side to 3.3v
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We will then connect the center of the Potentiometer to Pin 0. (Note that Pin 0 is an analog pin, which we'll need for the Potentiometer.)
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The other analog pins are 1, 2, 3, 4, and 10. See this chart for a pinout diagram: https://makecode.microbit.org/device/pin...
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You'll notice the Ground on the Bit Board is color coded White.
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The 3.3v hole on the Bit Board is labeled and is actually two holes right next to each other on the Bit Board. (There is a small line showing the connection between them.)
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If you've never used a micro:bit before you'll want to check out this guide: Bit Board V2 Setup and Use
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We're going to load the following code for our Potentiometer Map Number program: https://makecode.microbit.org/_Yv8Tkc4Tk...
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This code uses the map function to create a scale from 0 to 9 that "maps" to the 0 to 1023 values from the Potentiometer.
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Once the code is loaded it should start running immediately.
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You can power the micro:bit via the USB cable you used to load the code or you can use a battery pack plugged into the Bit Board.
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Turn the small blue knob on the Potentiometer and you should see a number between 0 and 9.
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The display might jitter a bit between two numbers since we're dealing with analog values.
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Follow along with our recorded Live Stream!
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You can watch the full video of us walking through this project, along with explaining and exploring the code: https://youtube.com/live/jN7oP8TrU8k
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Attached Documents
