
About this episode
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.
Guide: https://learn.adafruit.com/mini-led-matrix-audio-visualizer
Feather Sense nRF52840
https://www.adafruit.com/product/4516
LED Matrix 13x9 IS31FL3741
https://www.adafruit.com/product/5201
Code by Liz Clark on GitHub
https://github.com/adafruit/Adafruit_Learning_System_Guides/blob/main/Feather_Sense_Audio_Visualizer_13x9_RGB_LED_Matrix/waterfall_visualizer/code.py
Code by Phil B on GitHub
https://github.com/adafruit/Adafruit_Learning_System_Guides/blob/main/Feather_Sense_Audio_Visualizer_13x9_RGB_LED_Matrix/audio_spectrum_lightshow/code.py
3D Files on Thingiverse
https://www.thingiverse.com/thing:4983214/
3D Files on PrusaPrinters
https://www.prusaprinters.org/social/3814-adafruit/prints
uLab Learn Guide
https://learn.adafruit.com/ulab-crunch-numbers-fast-with-circuitpython
3D Parts Library on GitHub
https://github.com/adafruit/Adafruit_CAD_Parts
Visit the Adafruit shop online - http://www.adafruit.com
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New tutorials on the Adafruit Learning System: http://learn.adafruit.com/
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