Raspberry Pi Audio Spectrum Analyzer Tutorial Using HT16K33
Tutorial demonstrating how to build a Raspberry Pi audio spectrum analyzer using a bi-color LED matrix and a Holtek HT16K33 I2C LED controller driver. A 4 channel I2C-safe bi-directional logic level converter is used to handle communication between the 3.3V Pi and the 5V HT16K33. All code, schematics, notes and updates are available on my website: http://www.rototron.info/raspberry-pi...