(LED + Resistor in a socket - early version - subsequent attempts got neater)
First thing to do was all of the GI (general illumination i.e. always-on lights). I chose to use 5v DC for all of the lights, as the microcontroller I bought can run off 5v, too (more on which later). As this was my first attempt at anything electronic related, it took some learning of soldering skills etc, but I got much better at it as work progressed.