wirelesspower
Latest
Breath powered USB generator does charging on the go
Hey, we're tired of waiting for wireless charging solutions to actually hit the market just as much as the next guy (or gal), but one inventive soul took that frustration out on a swank DIY project that elicits energy from simply breathing. We've seen the use of hot air in powering gadgets before, but this homegrown USB charger was assembled by simply using "parts scavenged from an old CD-ROM drive, a basic electronic circuit, and a few rubber bands." The chest-worn device was intended to output around one-watt for charging a cellphone, which could purportedly juice it up in just under three hours, but unfortunately for us all, this seemingly brilliant device only mustered about 50mW of energy. Of course, that's still getting somewhere, but we're not exactly keen on wearing this thing around for an entire day in order to add a few battery bars to our mobile. Nevertheless, the creator doesn't look to be giving up on it so soon, and hopefully v2 will allow our breath to add new life to our lappies or electric cars, eh?[Via Slashgear]
Powercast looking to bring wireless power to reality
We know, energy without wires has always seemed like one of those novel concepts that sounds terrific in theory, but remains a tad difficult to imagine hitting the commercial scene for some time to come. Apparently, all that is about to become nonsense, as a Pennsylvania-based startup is set to capture the wireless-loving hearts of, um, everyone when it tackles contactless power products. Powercast has already "signed nondisclosure agreements to develop products with more than 100 companies (Philips, for instance), including major manufacturers of cellphones, MP3 players, automotive parts, temperature sensors, hearing aids, and medical implants." The firm's radio-wave-receiving miracle device trumps existing attempts by "adjusting to variations in load and field strength while maintaining a constant DC voltage," essentially ensuring that only low wattages (read: the stuff that garners FCC admiration) are flung around. The system basically consists of two parts -- a wall-plug transmitter and a "dime-sized receiver" that handles the real magic -- and energy is instantly transmitted whenever that disc comes within a yard or so of its tag-team partner. Incredibly, the receiver only costs "about $5" to produce, yet the outfit has already secured upwards of $10 million in private funding, which translates into one less American that desperately needs to win the lottery. Get ready folks, if all goes well, Powercast will be shipping "many millions of units" by the end of 2008 -- and maybe even sooner.[Via TWW]
eCoupled Intelligent Wireless Power debuting at CES next month
Looks like Fulton Innovation is getting ready to introduce a new system called "eCoupled" at CES next month that uses inductive coupling to wirelessly charge gadgets. We've been hearing about wireless charging solutions for gadgets for, well, years now (remember Splashpower?), so we wouldn't be surprised to see 2007 come and go with us charging all of our damn gadgets the old fashioned way, but Fulton has lined up some serious partners, including Visteon, Motorola, Mobility Electronics, and Herman Miller (they make office furniture). Their press release today is a little light on specifics, like when we'll actually be able to buy eCoupled-enabled gadgets, but presumably they're saving all that for CES.
University of Tokyo develops expansive plastic power sheet
It seems this whole "wireless power" phenomenon is just getting warmed up, as we've got yet another creation that promises to rejuvenate our gadgetry without forcing us to hunt for those easy-to-misplace AC adapters. Researchers at the University of Tokyo have demonstrated a prototype which consists of "plastic and flexible electronics" that can wirelessly provide power to "any device that touches its surface." Of course, gadgets would need to be equipped with "a coil and special power-harvesting circuitry" to receive the energy, but it still beats lugging around half a dozen adapters on every outing. While this flexible sheet still relies on electromagnetic induction like the one's that have come before it, this particular rendition features a dual-sheet design that allows it to intelligently divert power to objects touching any part of the sheet, while not wasting energy on parts not being occupied. Takao Someya, professor of engineering, estimates that there's still "about five years" before the sheet will overcome the current "reliability issues," but hopes to one day "power flat-screen panels without ever needing an electrical outlet."
MIT makes case for wireless power
We all know and love our WiFi laptops, 3G and DECT phones, and wireless TVs, keyboards, and mice. Thing is, that freedom is always interrupted by the need to re-tether and juice-up the rechargeables. So someone, somewhere must be seeking the Holy Grail of wireless power right? Oh, you betcha. In fact, Nikola Tesla (of AC power and 80's glam-band fame) was working on his Wardenclyffe Tower for long-range wireless energy transfer back in the 19th century. Now, MIT's Marin Soljacic, Aristeidis Karalis, and John Joannopoulos have outlined a relatively simple (for physicists) system that could deliver power wirelessly by harnessing the properties of resonance. You know, that phenomena which causes a played instrument to vibrate another of the same acoustic resonance or collapse bridges spanning the Tacoma Narrows when its mechanical resonance is exploited by a bit of wind. However, MIT's solution is based on the resonance associated with electromagnetic waves. Notably, they've investigated a special class of non-radiative objects with long-lived resonances that won't scatter energy like radio waves or infrared. When energy is applied to these objects, it remains bound to them allowing, in theory, for a simple copper antenna with a long-lived resonance to transfer energy to say, a laptop antenna resonating at the same frequency up to about 5-meters away -- any unused energy is simply reabsorbed. Hmmm, "reabsorbed" you say, into what? No worries, they haven't built a test system yet and besides, when the robots hear about this we'll have bigger concerns than infertility.[Thanks, Shig]
