You need a rasbperry pi 4 or greater, an Adafruit RGB Matrix HAT (or similar), RGB matrix, and sensors (I'm using sht31d, sgp30, and veml7700 from Adafruit). Once ...

A keyboard matrix circuit is a design used in most electronic musical keyboards and computer keyboards in which the key switches are connected by a grid of wires, similar to a diode matrix. This kind ...