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Banana Keyboard with micro:bit Guide

This document provides instructions for building a banana keyboard using a micro:bit, fruits, and alligator clips to connect the fruits to pins on the micro:bit. The keyboard is created by connecting a banana and orange to separate pins using crocodile clips, connecting headphones to play sound, and programming the micro:bit to play an increasing note sequence when the banana is pressed.

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mrlog1
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175 views7 pages

Banana Keyboard with micro:bit Guide

This document provides instructions for building a banana keyboard using a micro:bit, fruits, and alligator clips to connect the fruits to pins on the micro:bit. The keyboard is created by connecting a banana and orange to separate pins using crocodile clips, connecting headphones to play sound, and programming the micro:bit to play an increasing note sequence when the banana is pressed.

Uploaded by

mrlog1
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Banana Keyboard Workshop

Materials

 micro:bit, battery holder and 2 AAA batteries


 Banana
 Orange
 4 Crocodile clips
Steps

Step 1 Connect the ground lead

Using the 1st crocodile clip, connect the end of the crocodile clip onto GND pin of the micro:bit.
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Step 2 Connect the sound lead

Using the 2nd crocodile clip, connect the end of the crocodile clip onto pin 0 of the micro:bit.

Step 3 Connect the headphone to ground

Using the 1st crocodile clip, connect the second end of the crocodile clip onto based of the
headphone jack
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Step 4 Connect the headphone sound contact

Using the 3rd crocodile clip, connect the end of the crocodile clip onto the 1st crocodile clip
already clipped onto GND.

Step 5 Connect a fruit lead

Using the 3rd crocodile clip, connect the end of the crocodile clip onto the 1st crocodile clip
already clipped onto GND.
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Step 6 Connect the orange to ground

Using the 3rd crocodile clip, connect the unattached end of the crocodile clip onto the orange.

Step 7 Connect a second fruit lead

Using the 4th crocodile clip, connect the end of the crocodile clip onto pin 1 on the micro:bit.
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Step 8 Connect the banana

Using the 4th crocodile clip, connect the unattached end of the crocodile clip onto the banana.

Step 9 Complete banana keyboard

Your banana keyboard is ready!


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Step 10 Test the keyboard

Start Code
1). Start by adding a variable to store a musical note. Rename the variable to sound. Set the
value of the variable to the note block Middle A from the Music drawe

2). We want to play music when the fruit connected to a pin pressed. So, we register an
event handler that executes whenever pin 1 is pressed. Pin 1 is, of course, connected to the
banana. Add a on pin pressed block from the Input drawer.

3). Now, let’s create some notes to play when the banana is pressed. Click on the Loops
drawer then insert a repeat loop into the on pin pressed block. Click on the Variables drawer
and pull out a change item by block and put it into the loop. Rename the variable to sound.
Change the value from 1 to 25. This will increase the variable sound from the note frequency
of block Middle A to Middle A plus 25 and so on. Put a set to block for sound right after the
loop. Set it to Middle A a in order to reset the sound after a banana press.
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4). Finally, insert a play tone above the change by. Pull out the sound variable block and drop
it in the note slot of play tone. Change the beat fraction from 1 to ¼

Click Download and try a banana press. Did you hear 4 notes play?

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