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1.5

Major VersionM

by Pete Prodoehl

Introduction

Connect an LED to a Bit Board and control it with a micro:bit

We'll make the LED fade from off to the full brightness in steps using PWM (Pulse Width Modulation).

Video Overview

Featured Document

  1. We'll use Maker Tape to connect the LED to the Bit Board on a LEGO baseplate. Connect the Negative (-) side of the LED to a Ground (GND) hole on the Bit Board.
    • We'll use Maker Tape to connect the LED to the Bit Board on a LEGO baseplate.

    • Connect the Negative (-) side of the LED to a Ground (GND) hole on the Bit Board.

    • Connect the Positive (+) side of the LED to Pin 8 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.

  2. If you've never used a micro:bit before you'll want to check out this guide:  Bit Board V2 Setup and Use
    • 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 Fade program: https://makecode.microbit.org/_ArzM1u7Lt...

    • This code will make the LED gradually get brighter waiting a half second between each step.

    • The analog write command can be set to anything between 0 (off) and 1023 (full brightness).

    • We can choose which pin will be affected using the drop down control in the analog write command. Here it is set to Pin 8.

    • While digital write allowed us to turn an LED on or off, analog write allows for more control over the brightness of the LED.

    • 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.

    • The LED should start off then get gradually brighter in three steps.

    • 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/z8ONp1Q9ZV0

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Pete Prodoehl

Member since: 3/4/20

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