I want to make a sign that has a "Stranger Things" theme with Christmas lights and painted letters like in the show.
I was thinking to run 26 wires behind the sign to each light individually, and then a normal Christmas lights wire in front. Then the wires somehow make sure only the lights that the RPi wants to power are lit. In this way I could light any combination of lights that I want, or one at a time.
What should I buy at minimum to get this to work - this is for a highschool project so cheaper is better!