Champaign-Urbana Community Fab Lab
Champaign-Urbana Community Fab Lab

Iteration Assignment

This assignment was all about improving and building upon one or two of our previous assignments we did for this semester. I decided to combine the laser cutting and copper tape circuit projects by creating a wood cut-out of a cat with glowing LEDs for eyes.

Below are the laser cut and copper tape circuit assignments I had previously completed.

The first part was the laser cutting. I used Inkscape to create a silhouette of a cat image found on the Internet and added two 3mm-radius circles as eyes (3mm being the radius of the LEDs so they could fit through). In my first attempt, 3mm for each eye ended up being too small. I needed to make the eyes slightly bigger so that the LEDs could fit through, but not enough so there were noticeable gaps. 5 mm ended up being the ideal size. I also wanted to make some sort of stand that could hold the cat upright. Sara recommended trying the press-fit box design, so I used a website called MakerCase to design the box and also laser cut that out.

Then, I bought some acrylic paints and painted the cat silhouette so it looked more like a cat. I wanted to make it look like my cat at home, who is a gray tabby.

Press-fit box parts and painted cat silhouette

The final iteration was implementing the circuit. For this part, I used two batteries, two blue LEDs (as my cat’s eyes are blue), and copper tape to put together a series circuit that would light up the LEDs when the cat leaned against the stand. Thus, the stand also acts as a switch to complete the circuit and illuminate the eyes.

Circuit schema

Unfortunately, when the cat rests on the stand it doesn’t light up very well unless you line it up just right and press down pretty hard. I think I needed to attach the batteries a little more securely so everything remained connected when upright. But it still turned out kinda cute.

Nonetheless, this project was fun to do because it provided us a better opportunity for creativity and improvement. Personally I feel like if I had more time I could have come up with something a bit more useful or interesting, but I still enjoyed getting to be a bit more artistic with what I was doing. 

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