If there’s one thing you can do to take your songwriting to the next level, it’s getting to grips with new chords. Use our acoustic guitar chord charts - from basic open chords to the daddy of ...

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.