The LEDs are controlled by an Arduino UNO, which has the chord and scale charts stored in flash. For a user interface, [MushfiqM] used a 2×16 character based LCD and a low-cost IR remote control.

Created by one MushfiqM, the “Digital Chord Chart” could be programmed to play almost any song using TAB files that include chords and stylized note representations. While this isn’t nearly ...