I’d like to learn to read switches in a matrix, light up bulbs in a matrix, light up LEDs in a string controlled by changing a single # in a string to change one bulb but leave the rest the same, control solenoids, and interface with an MP3 player.
wow, yeah that’s the easy part. build a playlist of midi signals that one wants to map as input buttons then add a VS1053 CODEC Audio Evaluation Board to a breadboard and arduino to work as controller which then talks to everything else via GPIO.