Starter Guide

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Lesson 07 Button module
Introduction
In this lesson, let’s learn about controlling the matrix LED of micro:bit to
display smiles through the button module.
What are buttons?
Buttons are a common component used to control electronic devices. They
are usually used as switches to connect or disconnect circuits. Although
buttons come in a variety of sizes and shapes, the one used in this
experiment will be a 12mm button as shown in the following pictures. Pins
pointed out by the arrows of same color are meant to be connected.
The button we used is a normally open type button. The two contacts of a
button is in the off state under the normal conditions, only when the button
is pressed they are closed.