Lab 2: Custom Switch, Series and Parallel Circuits

For this lab, I created a sandwich switch using copper tape, a 3V cell battery, and a yellow LED, under a Harry Potter wand and spell used to light things: “Lumos”.

When the two pieces of paper are put together, the paper circuit is aligned, and by pressing the space between the two pieces of purple felt, the circuit is complete and the LED lights up.

Pictured above is my process from series circuit to parallel circuit. For multiple LED’s, a parallel circuit would be best: there’s a voltage drop associated with series circuits, as the voltage is split between each LED in use. Parallel circuits, however, experience a voltage drop so small in each progressive LED it doesn’t make a difference.

In order to create this circuit, I first built a simple two LED series circuit on the breadboard following the below schematic. I then added the parallel one after.


Schematic for connected circuits

When all of the lights were illuminated, particularly in the sort of half-clustered half-scattered way in which I had breadboarded them, they looked a lot like wildflowers to me.

I wanted to create a much stronger enclosure design this time, while also creating that garden vision. In particular, I thought it was important that this was easily removable without any damage to the circuit, as I saw that was a bit of an issue last class.


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