Engineer, Innovator..

Works

Fun with 3D Prints: Air Purifier

This time I printed out an air purifier. It uses an after-market Dyson air filter with a 10 speed duct fan. Very quiet on the lower speeds which I am very happy with. I later printed out a little attachment to help direct air so I can use it as a fan on hot days.

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Fun with 3D Prints: Ghosts of Tsushima

A cool samurai mask I found on Thingiverse. Modelled by flioink. Printed and painted by me.

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Fun with 3D Prints: Paper Pulp Molding

100% recycled material, 100% compostable and bio-degradable. Looking into the use-case for paper-pulp molded products. I experimented with different types of blended paper and combining agents. The cup insulator below is made with blended egg cartons and some white rice. The molding process was tricky, but it came out pretty stiff and durable. I was aiming to create a one-time-use zero waste coffee cup. The issue with using aluminum cups for coffee is that it can get extremely hot, hence the paper pulp molded coozie.

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3D Printed Phone Case Designs

I like to design and 3D print cases for my friends. I've done a bit of leather work in the past so most of my cases have leather backing. From top to bottom: Sony Xperia Z3 Compact, Glaxy S3, iPhone 6s+

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X-Men's Cyclops Visor

2015 Halloween! I designed and 3D printed a Cyclops visor. In the right ear, there is a rotary encoder and press button that allows me to step through 5 different colors. When the color is changed the visor will flash to give you a preview of the color. Pressing down on the ear piece will light up the visor to its full brightness. There is also a special dance mode. If you hit the ear piece 3 times, the visor will pulse random colors at the beat you hit it. Great for dance parties! Controlled by an Arduino board.

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Current Project: HackHD + Arduino = KF3000

A miniature HD camera controlled by my Android phone. I was looking to buy and dismantle a GoPro camera, but I stumbled upon the HackHD, which is about half the price and and still records in 1080p HD AND it comes naked (so I don't have to take anything apart). I used an Arduino mini to control the HackHD. In the MARK II I have integrated a Bluetooth chip to be able to link to my android smart phone and control it via a simple interface.

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The MARK II. Smaller with Bluetooth. Clip it on your collar or wear it around your neck.

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Here's a test run. I programmed the Arduino to record for 4 seconds every 5 minutes. I ended up with a 4.5min video at the end of the night.

Fun with 3D Printing!

3D Maneuver Gear Replica

3D Maneuver Gear is the equipment the heroes in the anime Attack on Titan use to soar through the air to fight the titans. It's what our hero Erin is wearing around his waist in the image below.

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I designed my 3D maneuver gear in SolidWorks and printed it out using my Afinia 3D printer. I used two compressed air canisters, a geared motor, and a simple pulley system to give some special effects.

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3D Printed Master Sword

The legendary Master Sword wielded by the elven warrior, Link (from the Legends of Zelda). This was also printed in partitions using my Afinia 3D printer and bonded together in the end. It's about 4 feet long. I have completed detailing the hilt, but still in the process of polishing up the blade. I am working to get a mirror finish to make it look as realistic as possible.

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Biolumenecense Flume

The overall purpose of the design of the bioluminescence flume is to use it as a means to visualize the flow around bodies submerged in dinoflagellates. Dinoflagellates are single celled organisims that live in the ocean. The flume was developed to help verify statistical models of dinoflagellate stimulation. This will help in the developmnet of a nighttime non-acoustic surveillance system for detecting moving underwater objects. Bioluminescence in dinoflagellates is activated by shear forces in fluid flow.

The objective of this project is to design, fabricate, and test a vertical flume for flow stimulation of dinoflagellate bioluminescence by test bodies mounted in the flume. The basis for our design is a gravity driven pipe flow with a clear and flat test section. A vat of concentrated dinoflagellates will be elevated and flown into the test section which is controlled downstream by a valve.

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To ensure a Reynolds number of greater than 500,000 the resulting flume was a staggering near 10ft tall with a 200 gallon vat.

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With close to a ton of water weight, the customized vat stand had to be analyized through finite element analysis and a buckling analysis. An in depth safety protocol was also developed and followed.

UUV Drag Analysis

In this project, the goal was to create a 3D CAD and fluid dynamics model of the San Diego iBotics Unmanned Underwater Vehicle (UUV). In oder to do this, the UUV was modeled and scaled down to 1/4 of its actual size. Pressure taps were to be implemented along the body of the scaled model at various points of interest to compute pressure coefficients. This data was then compared to data collected from a 3D model in SolidWorks using the FloWorks CFD package.

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The 1/4th scaled model along side the actual UUV.

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A complex SolidWorks model of the UUV.

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The model was tested using a SolidWorks simulation and in an actual water channel at various Reynolds Numbers.

Bed Design

This design project was purely just for fun, not for any organization. It is a fusion between traditional Japanese style flooring (tatami) and a modern American platform bed frame. It is a one of a kind 6.5x6.5ft platform bed. I have always made my own furniture, however, this one came out especially to my liking. It is quite a simple design and if anyone is interested, please email cfukunaga@kojifu.com. It was also designed to come apart and be put together without the use of any kind of tool AND the entire frame will fold and fit in the trunk of a Nissan 240sx (small coupe).

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A piano black laqour finish. This is my second time working with laqour and I must say, it came out much much better than the first time! 95% of the labor was in the finish.

Mini-Game Design for Mechatronics Class

This project was for the Design Engineering Laboratory's introduction to mechatronics at The Univeristy of Tokyo. One of the most fun and interesting course I have ever taken. The only instruction for this project: "Create a game that is fun for the person(s) playing it AND for people watching." The mini-game I created is very difficult to explain, eventhough it quite simple. But in short, it was title "Ninja's vs. Pirates" (I'm not exactly sure what my reasoning was behind this name) and it was mix between, charades, pictionary, karaoke.

I used a MyCon H8-3664 programable controller, a LCD screen and two buttons. The program was written in C.

When player 1 press the start button, three words pop up on the screen. The first word indicates the clue, which is read outloud and everyone get to hear. The 2nd word is how player 1 will attempt to communicate with his/her teammates, (talking only, actions only, draw a picture, or singing/rapping). The 3rd word is the actual word player 1 has to communicate to the others.

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This mini-game, mysteriously entitled "Ninjas vs. Pirates" ended up winning the "Best Mini-Game Design" award for a prize of a Toshiba blue-tooth head set.

2-Wheel Drive Motorcycle Research

At the Design Engineering Laboratory at the University of Tokyo, conducted research and submitted at paper on two-wheel drive motorcycle dynamics. A Matlab simulation was created to analise the thoretical dynamic behavior of a two-wheel drive. The paper deals with the dynamic behavior of a two-wheel drive motorcycle compared to that of a one-wheel drive. It mainly discusses and compares the handling and traction of the two.

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The poster above was awarded "Best Student Poster" at the Kanto Region Japan Society of Automotive Engineering poster presentation.