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.


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

This page (Overview) was last updated on Oct 04, 2021.

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