Engadget

Engineer Guy shows how a phone accelerometer works, knows what's up and sideways (video)

Jon Fingas — Tue, 22 May 2012 20:06:00 EST

We love finding out how things work, and arguably one of the most important parts of the smartphones and tablets we thrive on is the accelerometer gauging our device's orientation. Imagine our delight, then, when we see the University of Illinois' Bill Hammack (i.e. The Engineer Guy) giving a visual rundown of how accelerometers work. Although it's certainly the Cliff's Notes version of what's going on in your Android phone or iPhone, the video does a great job of explaining the basic concepts behind three-axis motion sensing and goes on to illustrate how MEMS chips boil the idea down to the silicon form that's needed for our mobile hardware. Hammack contends that it's one of the coolest (and unsung) parts of a smartphone, and we'd definitely agree; you can see why in the clip after the break.

Continue reading Engineer Guy shows how a phone accelerometer works, knows what's up and sideways (video)

Engineer Guy shows how a phone accelerometer works, knows what's up and sideways (video) originally appeared on Engadget on Tue, 22 May 2012 20:06:00 EST. Please see our terms for use of feeds.

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A bird in the hand thanks to a robot that can perch

Sarah Silbert — Wed, 02 May 2012 06:19:00 EST

Land-bound robots? Been there, done that. Researchers at the University of Illinois at Urbana-Champaign are taking things up a notch with a bird-style bot capable of autonomous flight. By replicating the features that enable birds to make a soft landing -- including the flapping wings that help them change direction -- the researchers developed the first micro aerial vehicle (MAV) capable of swooping down to perch on a human hand. The craft forgoes a vertical tail, which birds also lack, to allow for enough agility to land on a small surface. Articulated wings help the robo-bird complete the maneuver successfully, by first gliding into position and then pitching up and slowing down. Who knew perching was so complicated? Besides just providing a super-nifty party trick for these lucky researchers, the autonomous aircraft could be used in urban surveillance, where a small size would come in handy. Check out the MAV in action, along with the press release, after the break.

Continue reading A bird in the hand thanks to a robot that can perch

A bird in the hand thanks to a robot that can perch originally appeared on Engadget on Wed, 02 May 2012 06:19:00 EST. Please see our terms for use of feeds.

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Researchers develop self-healing electronics, adamantium sadly not included

Jason Hidalgo — Wed, 21 Dec 2011 20:56:00 EST

In today's feature-laden electronics devices, the failure of one little electronic component can scuttle the entire package. To make matters worse, if the damage happens to strike something like a multilayer integrated circuit, then you pretty much need to replace the whole computer chip. But what if the chip could repair itself like a certain vertically challenged Canadian mutant? That's exactly what researchers at the University of Illinois at Urbana-Champaign managed to do after placing self-healing polymers on top of a gold circuit. Once a break occurred, microcapsules with liquid metal filled the crack and restored 99 percent of conductivity in mere microseconds. Self-healing electronics would especially be helpful on things like aircraft, where miles of conductive wires can make finding a break difficult, researchers said. The research is just the latest in a field that also has seen self-healing sensors and shape-memory polymers, but sadly, there's still no word on using this stuff to self-heal a broken heart....

Researchers develop self-healing electronics, adamantium sadly not included originally appeared on Engadget on Wed, 21 Dec 2011 20:56:00 EST. Please see our terms for use of feeds.

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EES packs circuits into temporary tattoos, makes medical diagnostics fashionable

Daniel Cooper — Fri, 12 Aug 2011 23:52:00 EST

Flexible circuit pioneer John Rogers and his team are at it again. This time he's developing a wearable, ultra-thin circuit that attaches to your skin just like a temporary tattoo. The Epidermal Electronic System (EES) consists of circuits which could contain electrodes capable of measuring brain, heart and muscle activity in the same way an EEG does now, transmitting this data wirelessly to your doctor. Because it's flexible and bonds to the skin, it can be worn for extended periods, unlike traditional diagnostic pads used in hospitals today. In the lab, the devices were solar-powered with embedded photovoltaic cells -- heavier duty circuits would require inductive charging to be practical. Rogers' team also looked into the tech acting as a game controller (they wired it up to someone's throat and played Sokoban with voice commands, still managing to yield a 90 percent accuracy rate), but it's some way off from replacing your SIXAXIS. One of the problems encountered concerned RF communication -- perhaps they should get on the horn to their friends in Oregon and build those fashionable diagnostic pants we're eagerly waiting for.

EES packs circuits into temporary tattoos, makes medical diagnostics fashionable originally appeared on Engadget on Fri, 12 Aug 2011 23:52:00 EST. Please see our terms for use of feeds.

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Flexible, implantable LEDs look set to start a new body modification craze

Vlad Savov — Mon, 18 Oct 2010 10:53:00 EST

LED lights are cool, you're cool, why not combine the two, right? We doubt that's quite the reasoning that led to this international research project, but it's certainly an appealing way to look at it. Our old buddy John Rogers from the University of Illinois at Urbana-Champaign has headed up a research team with participants from the US, China, Korea, and Singapore, who have together produced and demonstrated a new flexible and implantable LED array. Bettering previous efforts at inserting lights under the human skin, this approach allows for stretching and twisting by as much as 75 percent, while the whole substrate is encased in thin silicon rubber making it waterproof. Basically, it's a green light to subdermal illumination, which could aid such things as monitoring the healing of wounds, activating light-sensitive drug delivery, spectroscopy, and even robotics. By which we're guessing they mean our robot overlords will be able to color-code us more easily. Yeah, that must be it.

Flexible, implantable LEDs look set to start a new body modification craze originally appeared on Engadget on Mon, 18 Oct 2010 10:53:00 EST. Please see our terms for use of feeds.

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Quantum batteries are theoretically awesome, practically non-existent

Vlad Savov — Tue, 22 Dec 2009 10:45:00 EST

Today's dose of overly ambitious tech research comes from the physics lab over at the University of Illinois at Urbana-Champaign, in a proposal titled "Digital quantum batteries: Energy and information storage in nano vacuum tube arrays." It's like a who's who of undelivered promises got together and united to form one giant and impossible dream, but it's one we'd prefer to believe in regardless. Aiming to improve battery performance by "orders of magnitude," the project's fundamental premise is that when capacitors -- and we're talking billions of them -- are taken to a small enough scale and packed to within 10nm of one another, quantum effects act to prevent energy loss. The projected result is a wonderful world of rapid recharges and storage of up to ten times the energy current lithium-ion packs can hold, as well as the potential for data retention. The only problem? It would take a year just to build a prototype, meaning we can expect market availability somewhere between a score from now and just prior to the underworld morphing into an ice rink.

Quantum batteries are theoretically awesome, practically non-existent originally appeared on Engadget on Tue, 22 Dec 2009 10:45:00 EST. Please see our terms for use of feeds.

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Electronic tongue tastes, identifies sweeteners so you don't have to

Joseph L. Flatley — Wed, 19 Aug 2009 14:53:00 EST

The tongue, besides being creepy, offers plenty in the way of research opportunities, as you know if you're a regular visitor to this space. In the past we've seen a tongue-based computer interface or two, the BrainPort sight-via-papillae solution, and this week, at the American Chemical Society's annual meeting, researchers from the University of Illinois at Urbana-Champaign introduced a sensor about the size of a business card that detects and identifies fourteen common sweeteners -- including Splenda, Sugar in the Raw, and Sweet'n'Low. The product of a decade of research in colorimetric sensor arrays, it works when dipped into the substance, and takes about two minutes to get results. The team, led by a Professor Suslick (really!), hopes that this leads to a low-cost solution for anyone who needs to monitor their blood glucose levels, and eventually a way to monitor contaminants in food or in the environment at large. We recommend using with D+caf caffeine testing strips to ensure that you get nothing out of your morning coffee whatsoever.

[Via CNET]

Filed under: Science

Electronic tongue tastes, identifies sweeteners so you don't have to originally appeared on Engadget on Wed, 19 Aug 2009 14:53:00 EST. Please see our terms for use of feeds.

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Software lets neighbors securely share WiFi bandwidth

Evan Blass — Fri, 28 Apr 2006 16:17:00 EST

Instead of fighting about property lines and whose dog is keeping everyone up at night, researchers from the University of Illinois at Urbana-Champaign want you and your neighbors to get together and share your WiFi signal in a method that supposedly delivers better performance to each individual user. Assistant computer science professor Haiyun Luo and graduate student Nathanael Thompson of the school's Systems, Wireless, and Networking Group have released a free download that analyzes local airwaves and exploits unused bandwidth from one network to complement ones experiencing heavy usage, but always gives users priority access to their own signal. Part of the two-year-old PERM project, the application uses flow-scheduling algorithms to determine bandwidth allocation, and has so-far undergone testing on Linux clients and with Linksys routers. Security is obviously a key concern in such a sharing setup, so PERM developed the software to both "preserve a user's privacy and security, and mitigate the free-riding problem."

[Via PCWorld]

Filed under: Wireless, Networking

Software lets neighbors securely share WiFi bandwidth originally appeared on Engadget on Fri, 28 Apr 2006 16:17:00 EST. Please see our terms for use of feeds.

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