Christina Elizabeth Hall

Assignment 4: Enclosure


For this week’s assignment, we were tasked with creating an enclosure of any kind.
My partner has had this Gristleizer effects kit for probably 5 years and hasn’t been able to build it because he didn’t have an enclosure and tools to customize it.

I thought this would be a perfect enclosure to make for class.

I found an enclosure on Amazon which was perfect because it already had the grates on the sides so that the contraption doesn’t overheat, with removable, metal face and backplates, and rubber feet.
I was looking for a particular box that had removable metal face and back plates so that I could customize the box easily. I was also interested in working with metal for this project because it’s a material I haven’t worked with much yet.

For my Gristleizer enclosure I wanted to etch what each knob did on the face plate. Luckily, this container was already painted blue, so I utilized this feature by etching off the paint to label the knobs.

Here is the Adobe Illustrator file that I created for the face plate for etching



First I tested the with cardboard


After a successful result, I etched on the face plate


Next, I moved to the drill press to drill the holes for the face plate and back plate.


This ended up taking quite a bit of time because many of the components had different size holes.  Additionally, I didn’t have a stepper bit, so any hole that was larger than 0.2 inches, I had to use three different bits of increasing size to cut the metal properly.

I learned quickly that because of the rigidity and thinness of these metal pieces, both sides of the plate had to be clamped down to get the perfect hole.  One of my holes is a little eaten up because the metal curled up the bit when one side wasn’t clamped down as seen in the above picture.

Here is how I made the rest of the holes:


Next time, I will bite the bullet and purchase the stepper bit because I’m sure it would have cut my time drilling these holes in half.

The final result


Front plate


Back plate



1-3 minute animated story — They can’t all be winners ;)


For our second animation assignment, we were asked to work with Adobe After Effects.

Here is the post with the initial story idea and the storyboard.

This was probably the hardest thing I’ve ever had to do. Create a 1-3 minute story in After Effects and animate it. This is what Grant Henry and I were able to come up with.

Process in Animating the Character

From searching through youtube videos to create a walk cycle, Grant came across the Duik plug-in in this tutorial that helps with rigging the character.  By using the puppet tool, bones are created which helps to create realistic movements and walk cycles.   I didn’t quite master the plug-in, but it might prove useful at a later date.

Duik helps with the squish and stretch components in a character — something that is very time consuming to do otherwise.

What worked in this animation

I think that using live footage for the background really helped for us to create the environment for the lamp. I think I would do this again, because I’m not so great a animating at this time, having a recorded background environment helped to fill out the story.

I liked that we ended up using the documentary-style story. This allowed for the story to jump around without it feeling to disjointed.

I’m very happy that we didn’t decide to have a mouth in this animation… I feel like that would have made it just that much more difficult.

What we might do differently

To just name a few issues…

  1. Tracking points on the wall where we have the poster so that it looks more realistic to animate
  2. Speed up some of the key frames so that the lamp doesn’t appear to be moving in slow motion
  3. improve the walk cycles 😉

Overall, it was a great experience.

After Effects is a very powerful tool that I feel I have just scratched the surface of. There is still so much to learn and I will continue to work with it to attempt to get comfortable in the software.

PComp Final: Magnetic Circuit


Here is the working LED circuit that is turned on with the magnetic switch


Here is the code:

const int LED = 3; 
const int sensor = 4;

int state; // 0 close - 1 open wwitch

void setup()
 pinMode(sensor, INPUT_PULLUP);

void loop()
 state = digitalRead(sensor);
 if (state == HIGH){
 digitalWrite(LED, LOW);
 digitalWrite(LED, HIGH);

Assignment 3: Laser Cutter


For the second 3rd class of Intro to Fabrications, we were introduced to the laser cutter.

We were tasked to try out different materials and spend some time getting familiar with the cutting and etching abilities of the laser cutter.

With the upcoming holidays, I was interested in attempting to make some ornaments for my family.

I’m also interested in working with more raw materials rather than just plastic acrylic.

My Project

I worked on all laser printers 50W, 60W and 75W so I now feel comfortable on all machines.


I decided to use acrylic of two different styles, plain white and marbled white, to create a snowflake ornament that had an etched leather hanging strap.

I used Adobe Illustrator to create swirls for the etched leather


This was the end result after many 5 replications on the laser cutter


And here is the acrylic snowflake process:

This is the test cut on cardboard


And here is the actual cut in acrylic:


Here is the end result


Because the leather wasn’t treated and was all black, it was hard to see the etching on the hanging tie, so I may not do that the next time.

I did enjoy working with leather in this instance and will try to think of another applications where the usage of the laser cutter is more obvious.