Process:
There wasn’t a whole lot to the process on this one, to be totally honest. I did have to look up the pin out for the 7805 before I could start, but once I had that I just hooked up the barrel jack and then followed along with the circuit diagram. I did have to do the math to calculate the resistors’ values, which was a bit of a speed bump, but I eventually figured it out. In lab I had made a small pressure-sensor-type switch out of foam and copper tape (photo below). When I got home and started working on the enclosure, I decided to change the switch out for the hinge of the enclosure itself. I used a little square of copper tape on each half, then just ran the wires back to the breadboard. You close the box, it lights up, bob’s your uncle.
Photos
Series Circuit
Parallel Circuit
Circuit Diagrams
