CH6-A - Four Buttons Fade

We'll use Maker Tape to connect the four Buttons and the LED to the Bit Board on a LEGO baseplate.

We'll connect our LED to Pin 1 and one of our Buttons to Pin 4 and the others to Pin 5, Pin 6, and Pin 7, respectively.

And of course we'll connect the Ground (GND) sides of each component to Ground on the Bit Board.

You'll notice the Ground on the Bit Board (as well as the LED and other Crazy Circuits components we'll use) is color coded White.

While the LED has Polarity our Button does not. If you connect it the other way around it will still work fine. Not all components have Polarity.

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 Four Buttons Fade program: https://makecode.microbit.org/_F0L0iCUrU...

This code uses a function which will run when a button is pressed. A different parameter will be sent depending on which button you press.

Our function brightnessX accepts one parameter, which tells the function the brightness level it should set the LED. (Remember, we can choose a value between 0 and 1023.)

The function will turn on the LED at the determined brightness, wait one second (1000 milliseconds) and then start a repeat loop to decrease the brightness, making the LED fade down.

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.

Press a button and you'll see the LED turn on for a second, and then start to dim. Try the different buttons for different initial brightness values.

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://www.youtube.com/watch?v=Huqyi9A8...