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1.4

Major VersionM

by Pete Prodoehl

Introduction

Connect two pushbuttons to a Bit Board and control an LED with code.

We'll explore how we can use two pushbuttons as inputs for the micro:bit

Video Overview

Featured Document

  1. We'll use Maker Tape to connect the two 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 other to Pin 5.
    • We'll use Maker Tape to connect the two 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 other to Pin 5.

    • 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.

  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 Two Buttons LED program: https://makecode.microbit.org/_YqR0EYboq...

    • This code will blink the LED 6 times if you press the left button and 3 times if you press the right button.

    • We are using an if then block checking for the button on Pin 4 to be pressed (pulled down to ground), or for the button on Pin 5 to be pressed, and if their is true the else gets triggered and the LED is set to off (or "0" or "low").

    • We've also used the repeat block to easily make the LED blink either 6 or 3 times.

    • 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 turn on and blink either 6 times or 3 times depending on which button you press.

Finish Line

Pete Prodoehl

Member since: 3/4/20

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