STM32 Audio visualizer DOT MATRIX

Audio Visualizer based on STM32 bluepill utilizing Fast FFT and hacky trick to make the Matrix LED working nicely together.

Compact Size

Made a small Add-on type PCB that laches on the back of the LED matrix.

Components

The Audio Visualizer features Real-time audio visualization with Fast Fourier Transform (FFT) to accurately visualize real audio frequencies rather than just detecting high or low noise levels.

• STM32 Bluepill
• MAX4466 Microphone Module
• 8x8 Matrix LED * 4

Software Used

• Kicad : PCB Design
• STM32MAX : Project Configurator
• T-filter : Desgning Fir filter

Tools Used

• Lab power supply
• Oscilloscope
• ST-LINK/V2 debugger