In this project, you'll learn how to build an audio reactive LED matrix using the 13x9 IS31FL3741 LED matrix and Feather Sense nRF52840 board with CircuitPython.

The Feather Sense nRF52840 features a built-in PDM MEMs microphone for audio input. Audio is sampled via the onboard PDM microphone. The sampled data is then visualized with color.

The 3D printed case houses the two boards and snap fits for an easy assembly. The case features a built-in button presser for using the reset button without having to take it apart. The LED matrix and Feather are secured to a PCB bracket with hardware screws and nuts.

Prerequisite Guides

Take a moment to review the following guides.


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This guide was first published on Oct 06, 2021. It was last updated on 2021-10-14 09:48:00 -0400.

This page (Overview) was last updated on May 19, 2022.

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