Champaign-Urbana Community Fab Lab
University of Illinois at Urbana-Champaign
Champaign-Urbana Community Fab Lab

Author Archive

Iteration Project – iPad Pouch/Clutch

 I created a pouch for my iPad and other belongings for the iteration assignment. 


For the previous sewing/textile assignment, I made a tiny box pouch. The reason I decided this assignment for the iteration is because I found the making process very enjoyable and wanted to make a different type of object with different textile, and also because I wanted to improve the overall quality of the product, especially focusing on the quality of the embroidery.


This is the box pouch I made for the previous assignment. It is very cute, however the biggest mistake I made was the position and the quality of the embroidery. Also, I used cotton fabric for this pouch, which made it hard for the pouch to maintain its shape. Thus, I focused on two big things for the iteration project: (1) embroidery, (2) fabric.

This is the initial prototype I created for this assignment. I wanted have an embroidery in the middle of the pouch, and have an inner pocket for my belongings.

I used the felt fabric for my electronic device as it wasn’t stretchy and also it is widely used for making big pouches/clutches. After selecting the color of felt fabric I planned on using, I measured and cut all the pieces I needed. Then, I moved on to designing the suitable embroidery for the pouch, and since I chose red as the color of my pouch, it was not easy to come up with the right color scheme for the embroidery. 

I first thought of doing red & pink combination, which I’ve always thought was pretty cute. I designed 4 pixelized hearts with different shades of pink. I embroidered a piece of felt fabric with the hearts, however, I did not like the outcome. 



First of all, the hearts were so tiny. Also, the shades of pink were too light and undistinguishable. So, I just started over and created a new design. I still liked doing a heart shape embroidery, so I thought about what heart design I would want on my pouch. I’ve been a huge fan of oldschool, traditional designs/illustration/tattoos, so I found an image of a traditional heart design. With Inkscape, I changed the colors of each section of the design with the colors that I wanted. I was satisfied with the new embroidery design as well as the outcome after an hour of the embroidery process. 



Next steps were just sewing all the pieces together. I wanted an inner pocket as I designed in the initial prototype, so I sewed in the pocket first to an inside piece. One thing I realized while sewing was that sewing a larger objects was more difficult than small pieces like the box pouch I made. I tried my best not to make mistakes and to sew as straight as possible. 


Below is the video of the entire process. 








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Pom Bot – Charis Ryu

In-class: one motor bot

I created a cat bot with a wagging tail with a servo motor for the in-class project. I used a cardboard tube for the body and attached the motor inside the tube. Then, I created the bot’s face with a plastic lid and tail with wires, covering them with brown nonwovens.


Locomoting pom bot: 1st Prototype

For the first prototype of my pom bot, I used ice cream sticks for the body and legs. I watched several different 2-3 motor walking bot videos, and thought creating a 4-legged 2-servo bot would be the approachable solution. I watched a video of the making of 3-servo walking bot (, which I also found interesting, however I decided to stick to the 2-servo walking bot for the project. Next time, I would like to try this approach, as it seemed like a very clever, sophisticated solution.


I used the hot glue to attach the servo motors under the body and the legs with the motors. As you can see in the photos and the video above, I had two main problems: (1) the general structure of the bot was very weak and the back of the bot was not strong enough to carry the board, and (2) it didn’t seem that the bot was walking forward properly. I had to come up with a better walking algorithm that doesn’t use the original for loop (as it didn’t seem like the best solution to make both the motors to move individually) and make the bones of the bot stronger.


2nd (Final) Prototype

In order to fix the two main issues I’ve encountered while making the 1st prototype, I used more ice cream sticks to give more structural support and changed the algorithm code that makes the motors to rotate that makes the legs to move properly. Then, I used the fabrics, feathers, and hot glue to give the bot an aesthetic look.








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Scheduled Brightness Adjusting Lamp Prototype – Charis Ryu

For this assignment, I created a prototype of a touch lamp that has the functionality that allows the user to schedule and automatically adjust the brightness based on the current time, based on their lifestyle. For example, there is a user who studies everyday 6-9pm, reads book/get ready to go to bed 9-12am, and sleep 12-8am everyday. The user will want a study lamp while studying, a reading/bed lamp while reading book on the bed, and a night lamp while they sleep before the sun rises. This lamp I designed can adjust the brightness based on the time schedule set by the user, and when the user turns on the lamp with the touch sensor, the lamp will set the brightness based on the hour when the user turned it on. Then, when left on, the lamp will automatically change the brightness. Below is the low-fidelity prototype of a possible usability scenario I drew. 


The arduino set up I had for the assignment was basically the same as the touch sensor setting. For the code, I imported two libraries called Time Library and DS1307RTC Library to get the current time.

The basic logic of the code is to check the current time when the lamp is turned on, and if the time equals to a certain hour (ex. 4, 9, 14), set the brightness of the LED to a certain value.  Below is the code I wrote.


The aluminum foil worked as the touch switch for the lamp. The LED did not successfully follow the algorithm of the code however, and I tried to debug the code while making sure each part of Arduino was connected. Although I thought the code and hardware seemed simple enough, as it was my first time using Arduino, it was not a familiar process. Next time, I think I will make sure to give enough time for the debugging process. 



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Textile Project – Box Pouch

Drawstring Bag

Above is the drawstring bag I made during the first lab section. There were two orange drawstrings (ribbon strings) originally used, but I wanted to find better drawstrings that is better to use than ribbon strings.



Above is the embroidery that I have created during the second lab section. I used light purple for the face of the cat, light pink for the ears and cheeks, and finally black seam for the details of the face. I was very amazed by how the machine created this embroidery in such a short time with accuracy. 


Box Pouch with Embroidery


Above is the final looks of my box pouch I made for the third assignment. One thing you may have noticed is that the rainbow embroidery is upside down. Haha, I noticed it too, but it was when I already sewed the zipper, and also I thought it could give my pouch some uniqueness, so I ended up leaving it that way. 


I created a clean svg version of a rainbow illustration. I used the embroidery software, then sent the file to the sewing machine. 

Since the textile was not strong enough for the speed of the embroidery at first, so I tried again with a backing, and it worked!


Next steps were not that difficult, however I realized that I needed more practice in general to make a pouch or any item with sharp edges, better shape, and everything. 



I think it turned out pretty nice, the rainbow embroidery, the color of the zipper, and the pattern looks cute together too. It took me about 7 hours to make this pouch and embroidery, but I think next time, it will definitely take me a shorter time as I know what I have to do. 

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Charis Ryu 3D Printing

Alien/Alien Castle (Tinkercad, Meshmixer)

The image on the left is the alien castle I created with Tinkercad and Meshmixer. I imagined the castle having a very simple design with the ring floating around the pole, which could be a signal machine for them to interact and communicate with other aliens. The right image is what I thought alien would look like. 


4 Prototypes


I created paper prototypes for the 4 prompts given. I chose to design the actual 3D models of the dishware and art piece prompts. The image of the dishware is a multipurpose/functional pot that could be used as a cup, a bowl, a plate, a pot, and a pan. The handles, bottom plates, and the lid can be attached/detached to serve the user’s need and purpose. The second 3D prototype I made was an alteration of Louise Bourgeois’s Le Lit Gros Edredon. I created the prototype and the final 3D printed version as below. 


Final Product & Face Scan

This is the original 3D model I created with Tinkercad. I created the bed frame and used 3D cloud models to create a mattress/blanket of clouds as clouds make me feel comfortable. Then, the lo-fi version of myself is lying on the cloud bed. 

During our lab session last week, we got a chance to scan our own faces. I used this 3D model of myself in the previous 3D prototype. The final prototype looked as below.

The pink part of the model is my face. I included myself and a 3D model of a cat in order to create more personality and individuality to the piece. While the original piece had two lovers in bed together, I had my cat and myself to represent mental peace and comfortable atmosphere, which was further enhanced by the clouds. 

These are the 3D printed result of my prototype. It took around 7-8 hours. I then spray-painted it with the primer in order to paint the model with nail polish. 

The outcome! I painted the model with the combinations of blue, yellow, white, brown nail polishes. It’s hard to see in the picture I took, but I also used glitter on myself, to represent the delight and peace I’m having in this art piece. 


Final Thoughts

It was pain in the ass to get rid of all the supports as there were so many. I couldn’t completely remove them from the model, so unfortunately some parts look a bit messy. Next time, I would like to create a design that doesn’t need as many supports. Although it took 7-8 hours, it was a very fun experience, it was surprising to see how accurate the 3D printer can print the model. 


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Charis Ryu Paper Circuits

Fish Bowl Paper Circuit





I created a fish bowl paper circuits with the LED lights as bubbles from the mouths of the fishes. I used purple and yellow LEDs, two resistors, and two parallel circuits of the LEDs with same color. I used two batteries with total of 6V. 

Designing and making the circuits were not easy, in fact I had to remake the whole circuit as the first one had bad connection throughout the whole circuit. I designed the shape and positions of the circuit and lights based on the positions of the fishes in the fish bowl. Then, I calculated the resistance based on Ohm’s Law. I needed two resistors, each for the purple and yellow parallel circuits. Below is what the inside of the fishbowl looked like with the circuit.


Final Thoughts

It was very fun to work with LED lights and copper tapes although they were pretty difficult to use and handle. After several trial and errors, I was happy to come up with my fish bowl paper circuit. 

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Multi-layer Octopus Ice Cream Sticker

Octopus Ice Cream Sticker


I created a cute octopus ice cream cone sticker with Silhouette Studio and sticker cutter.  



First, I designed the octopus ice cream using Inkscape. I made each colored section/part of the ice cream separate layers so that I can cut them out separately. Below is my design and what each part looked like before they were cut out by the sticker cutter machine. I wanted to use the pink-yellow combination like my design, however I found some green and yellow sticker sheets, which I decided to use for my sticker. 


 Above are the sticker sheets with each parts cut out by the cutter machine. I had a bit of a trouble lining up the sheets on the sticker machine, and failed several times due to slightly mispositioning the sheets. I figured out how it worked after all, and successfully cut out all the layers needed. Finally, I assembled the layers together and created the final sticker as below. I put my sticker on the back of my laptop!


I realized that the sticker was a bit bigger than I thought, as each layers were smaller, but when they were assembled together, it got bigger. Next time when I make a sticker, I should be aware of the total size as well as the sizes of the individual parts. Although I thought the new color combination that I decided to go with were not as good as the original pastel pink-yellow combination, it turned out looking pretty good. 

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Black Acrylic Name Tag


I made a circular name tag with my name on the bottom with one of my favorite fonts, two cocktails with the drinks, inner part of the glasses, cut out, and a moon engraved on the black acrylic. Below is my design.


I used different shapes of gray to engrave the moon, table, and tiny details (such as olives, pineapple, cocktail glasses). I used the red stroke for all the cutting parts such as the inner area of the glasses and the name tag itself. I wanted to cut out the inner parts for aesthetics, so that any background it’s in can look like drinks in the glasses, like the photos on the top of the post or below.



One mistake I made was making the straw too thin, which broke while removing the inner piece of the tall cocktail glass. I had to use a super glue to stick it back. The pineapple, small triangle on the left glass, was originally cut out, but I glued it back due to personal preference. 

Using black acrylic as the material was very fun, although the speed was very slow and felt like it took forever to finish cutting/engraving. Though completing this assignment, I learned about and understood the difference among different materials and their unique characteristics while using the laser cutter.




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