CH11-E - Potentiometer Line Smooth

We'll use Maker Tape to connect the Potentiometer to the Bit Board on a LEGO baseplate.

We'll need to connect one side of the Potentiometer to Ground (GND) and the other side to 3.3v

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.)

The other analog pins are 1, 2, 3, 4, and 10. See this chart for a pinout diagram: https://makecode.microbit.org/device/pin...

You'll notice the Ground on the Bit Board is color coded White.

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.)

If you've never used a micro:bit before you'll want to check out this guide: Bit Board V2 Setup and Use

We're going to load the following code for our Potentiometer Line Smooth program: https://makecode.microbit.org/_hTPboEafb...

This code is similar to our previous example, but we've added a for loop to plot a vertical line rather than just a single pixel.

We could have easily added four more plot commands and hardcoded the y value but a loop is a bit less code in this case.

Once the code is loaded it should start running immediately.

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.

Turn the small blue knob on the Potentiometer and you should see a column of 5 pixel move left or right.

Could you easily modify this code to make a horizontal line go up and down instead?

Follow along with our recorded Live Stream!

You can watch the full video of us walking through this project, along with explaining and exploring the code: https://youtube.com/live/jN7oP8TrU8k