Imre - Wow, you are really patient! I'm glad you persevered and succeeded in making the origami ninja star!įrom Jeff in New Yorl "This is really cool and if you do it tight enough you can throw it like a real ninja star and it won't fall apart!!"įrom Alec in New York "Here are some attemps that i did.HIGH-YA!!!"įrom Emmet in Daars "Newspaper origami ninja star" I really enjoy origami and this is the best site i found its really good with the pictures on other sites they use drawings and I don't really understand those." Your site is the best one I've found for instructions, and I'm making my way through it! This one's the ninja star."įrom Jeannette in California "Christmas Origami Ninja Star :)"įrom reader in Barcelona "Origami Shuriken, actually few of them in different colors."įrom Paul in London "this is my first attempt at it"įrom Tien of London "A couple of ninja stars I folded after looking at this easy tutorial."Ī rainbow of ninja stars in different colours!įrom Imre in Noord-brabant Netherlands "This was like my 10th attempt to make this star before I finally suceeded. My niece brought me some origami paper from Japan for Christmas. It's hard to not love the origami ninja star, isn't it? :)
Second thing from this site that i made."
Thanks to reader Nick from Oklahoma for submitting his origami ninja star! " The research was published in the journal Biosensors and Bioelectronics.Made this origami? Comment and Submit your photo using the comment box at the end of this page!Ĭheck out the origami ninja stars made by our readers! Don't they look great?! The team is now working to develop a fully-paper-based device with the same power density of the ninja star design but at a lower cost. This is because a carbon cloth is used for the anode along with copper tape, compared to pure filter paper in the original. Where the original cost around five cents, the ninja star version costs around 70 cents to produce. While the performance enhancement is promising, the more intricate design does come at a price. "Ultimately, I'd like to develop instant, disposable, accessible bio-batteries for use in resource-limited regions." "Commercially available batteries are too wasteful and expensive for the field," says Choi. While paper-based versions of these are available, the researchers claim that they aren't as sensitive as the more sophisticated electrochemical and fluorescent versions, but other sources of power aren't always practical. Using a low-cost battery like this to power pregnancy and HIV tests could greatly expand access to these kinds of medical devices. We can light an LED for about 20 minutes or power other types of biosensors." This time, we increased it to the microwatt range. "The power density was in the nanowatt range.
"Last time, it was a proof of concept," says Seokheun Choi, assistant professor of electrical and computer engineering at Binghamton University. This state also allows the separate battery modules to connect with one another, which improves power output and also exposes the air-breathing cathodes to the air. Within each of the modules are paper layers, an anode, proton exchange membrane and an air-cathode, while in the center is an inlet where the dirty water is fed.Īs the battery is pulled apart into a donut-shape, fluidic pathways running through the paper layers carry the water into the eight fuel cells and kick off the electricity-producing chemical reaction. Where the original design folded up like a matchbook with four modules laid on top of one another, the latest iteration packs eight batteries into a sliding, star-shaped frame. Powered by the bacteria in a few drops of dirty water through the process of bacterial metabolism, the paper-based battery could be built to run a biosensor in the field at a cost of just five US cents. Researchers at the Binghamton University in New York developed their origami battery with a view to powering low-energy devices where electricity isn't so readily available. The team has now given its bacteria-powered device a boost, tweaking the design to resemble an origami ninja star and upping the power density in the process.
Last year, a team of US-based researchers demonstrated an origami-style battery that could produce small amounts of electricity using dirty water.
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