Unconventional Switch: Aluminum Rings

 

For the project, it stated that it can follow an inquiry into either aesthetics or problem solving. I am very much a man of aesthetics, specifically the aesthetics of the hyper-advanced prosthetics found in media like Deus Ex, Cyberpunk 2077 and other futuristic sci-fi media. I always imagined that I could make those kinds of electronics, so two aluminum rings touching to turn on an LED is as good a place to start as any.

The circuit is as follows: starting from the 5.03 V supplied by my Arduino, it goes through 3 resistors: 2 that goes for 330 ohms and 1 for 220 ohms, to get a total of 890 ohms. Following my calculations as seen in my schematic, the desired resistance was 830 ohms, so it's only off by about 60 ohms. What follows next is the switch, comprised of my two aluminum foil rings, which is then connected to the white LED, with a forward voltage of 2.75 V, than it goes to ground.