In this project we'll build an MP3 Player based on the Feather M0 with a Music Maker wing. It plays a wide range of audio formats like such as MP3, AAC, Ogg Vorbis, WMA, MIDI, FLAC, WAV (PCM and ADPCM)! It also features a removable SD card for storage! Its portable and easy to power with the Feathers built in rechargeable circuit. The tiny size is perfect for installing inside small areas or as a wearable!  

Parametric Design


The player design is based on Gordon Cole's Hearing Aid from the popular show Twin Peaks.


We thought it would be fun to model the design around this characteristic wearable but with a twist.


Instead of a hearing aid, we made an aid for hearing music. ha.

 Although a fun design we include the source file to easily modify the design to fit any theme!


You can optionally print the included clip to make an awesome wearable mp3 player!


It can clip onto your front shirt pocket or on a belt clip. Easy to reach, soft tactile buttons let you quickly access the play, pause and next buttons.


The volume knob is easy to control with editable gain adjustments in the code. 

Prerequisite Guides

Check out the following guide below to get a better understanding of the Feather M0 pin outs.

Feather M0 Express 

Parts, Tool & Supplies

If you don't have access to a 3D printer, you can send the files to a service or check with your local hackerspace/library.


Adafruit Feather M0 Express - Designed for CircuitPython
We love all our Feathers equally, but this Feather is very special. It's our first Feather that is specifically designed for use with CircuitPython!...
In Stock
Adafruit Music Maker FeatherWing - MP3 OGG WAV MIDI Synth Player
Bend all audio files to your will with the Adafruit Music Maker FeatherWing! It's a fun-size version of our Music...
In Stock
Soft Tactile Button (8mm) x 10
Put your project in stealth mode with these silent Soft Tactile Switch Buttons. Tactile switches are standard input...
Out of Stock
Breadboard trim potentiometer
These are our favorite trim pots, perfect for breadboarding and prototyping. They have a long grippy adjustment knob and with 0.1" spacing, they plug into breadboards or...
In Stock
Breadboard-friendly SPDT Slide Switch
These nice switches are perfect for use with breadboard and perfboard projects. They have 0.1" spacing and snap in nicely into a solderless breadboard. They're easy to switch...
In Stock
Short Feather Male Headers - 12-pin and 16-pin Male Header Set
These two Short Male Headers alone are, well, lonely. But pair them with any of our 
In Stock
Short Headers Kit for Feather - 12-pin + 16-pin Female Headers
These two Short Female Headers alone are, well, lonely. But pair them with any of our 
In Stock
Lithium Ion Polymer Battery - 3.7v 100mAh
Lithium ion polymer (also known as 'lipo' or 'lipoly') batteries are thin, light and powerful. The output ranges from 4.2V when completely charged to 3.7V. This battery...
In Stock
Adafruit LED Sequins - Emerald Green - Pack of 5
Sew a little sparkle into your wearable project with an Adafruit LED Sequin. These are the kid-sister to our popular Flora NeoPixel,...
In Stock
4GB Blank SD/MicroSD Memory Card
Add mega-storage in a jiffy using this 4 GB micro-SD card. It comes with a SD adapter so you can use it with any of our shields or adapters! Preformatted to FAT so it works out of...
Out of Stock

This guide was first published on Oct 25, 2017. It was last updated on Oct 25, 2017.

This page (Overview) was last updated on May 13, 2021.

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