CH3-A - LED Blink Alternately

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

Connect the Negative (-) sides of the LEDs to a Ground (GND) hole on the Bit Board.

Connect the Positive (+) side of the first LED to Pin 1 on the Bit Board.

Connect the Positive (+) side of the second LED to Pin 2 on the Bit Board.

Connect the Positive (+) side of the third LED to Pin 3 on the Bit Board.

Connect the Positive (+) side of the fourth LED to Pin 4 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.

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 LED Blink Alternately program: https://makecode.microbit.org/_ih2Uu3bV2...

This code will make the first and third LEDs turn on while the second and fourth LEDs are off, then alternate.

We've created two variables, named pauseTime1 and pauseTime2 that allow us to set the length of time to pause in our code.

You'll notice we have a command for led enable set to false in the on start block.

The led enable command enables or disables the built-in LED matrix on the front of the micro:bit

We need to turn off the built-in LED matrix to properly use Pin 3 and Pin 4 otherwise they will be available to the built-in LED matrix and conflict with our code to control our LEDs.

You can see a description of the micro:bit pins here: https://makecode.microbit.org/device/pin...

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.

LED one and three should turn on while two and four are off, then they will alternate so two and four are on and one and three are off.

In future guides we'll use four LEDs along with sensors or other input to act as a small bar graph or level indicator.

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=_ArsMH4A...