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Mass Market Hopes For Battery-free Cell Phone Technology (reuters.com)
Mark Hanrahan, writing for Reuters: Researchers in the United States have unveiled a prototype of a battery-free mobile phone, using technology they hope will eventually come to be integrated into mass-market products. The phone is the work of a group of researchers at the University of Washington in Seattle and works by harvesting tiny amounts of power from radio signals, known as radio frequency or 'RF' waves. "Ambient RF waves are all around us so, as an example, your FM station broadcasts radio waves, your AM stations do that, your TV stations, your cellphone towers. They all are transmitting RF waves," team member Vamsi Talla told Reuters. The phone is a first prototype and its operation is basic - at first glance it looks little more than a circuit board with a few parts attached and the caller must wear headphones and press a button to switch between talking and listening.
Interesting article on bit coins. Now what about this battery free phone?
They created self winding watches, can't they make self winding cell phone?
Before anyone dismisses this outright, please read up on how a crystal radio works.
https://en.wikipedia.org/wiki/...
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If you post as Anonymous Coward, don't expect a reply.
Back in my day we bought the most expensive phones we could! and they were damned slippery too! why, just one errant flick of the wrist you'd destroy an entire paycheck or more of the most advanced, encumbered, and contractually obligated silicon you'd ever set your eyes upon! And the government spied on us all the time and lied to us about it...and we liked it that way!!
now you damned millenials want to take the battery out? how will my phone swell menacingly over the years due to shoddy manufacturing processes? Back in my day we used to throw parties to celebrate whoevers phone blew up first. Dorris in accounting lost a damn leg from her Samsung but ill tell you one thing...nobody in the office would forget those fireworks! and think of THE CHILDREN! you know, the ones that make these phones and enjoy constant exposure to the byproducts of battery manufacturing. And what about charging?? Back in my day we used to charge all day every day until the battery went bad, then we'd buy more phones! its like you kids dont even understand how fun it is to buy a new phone every year or something.
Good people go to bed earlier.
I wonder if this battery-free cell phone from the University of Washington is anything like the battery-free cell phone from the University of Washington last month?
https://mobile.slashdot.org/st...
I don't know if there's much historical evidence of that one way or another. However, it is worth pointing out that Nikola Tesla invented the AC induction motor - a rather impressive demonstration that AC power distribution could be used for machines. Each Tesla car has an induction motor in it - something that I think Nikola would be both proud and impressed by.
It was posted on July 9 I wonder if we'll see it again on September 9 too.
Yes, just like solar cells taking in sunlight increase the output of the sun!
I browse on +1 so AC's need not respond, I won't see it.