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The uBeam FAQ

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Fungus:

--- Quote from: mikeselectricstuff on January 15, 2019, 10:49:03 pm ---"I wouldn't be doing my job if I didn't ask about safety"
..and power transferred, cost, efficiency... ?
Thought not. Typical clueless idiot journalism

--- End quote ---

Apparently you can replace the 9V battery in your smoke alarm with one of these.

That's progress!

djos:

--- Quote from: Fungus on January 15, 2019, 11:34:25 pm ---
--- Quote from: mikeselectricstuff on January 15, 2019, 10:49:03 pm ---"I wouldn't be doing my job if I didn't ask about safety"
..and power transferred, cost, efficiency... ?
Thought not. Typical clueless idiot journalism

--- End quote ---

Apparently you can replace the 9V battery in your smoke alarm with one of these.

That's progress!

--- End quote ---

so if your house catches fire during a power outage, you are royally fk'd!  :palm:

PaulReynolds:
I expanded that post to a blog, for those interested:

https://liesandstartuppr.blogspot.com/2019/01/more-ubeam-at-ces-2019-macworld.html

Daixiwen:
I didn't notice in the partners table before, their partnership with Korean CE Co. for a "wirelessly powered robotic vacuum". With the amount of energy required, you'll probably get your house cleaned with the ultrasounds alone :D

StillTrying:

--- Quote from: PaulReynolds on January 16, 2019, 08:48:55 am ---I expanded that post to a blog, for those interested:
https://liesandstartuppr.blogspot.com/2019/01/more-ubeam-at-ces-2019-macworld.html
--- End quote ---

 :)
I watched the blue-white RX LEDs coming on 2 or 3 times in the video, with superbright LEDs that amount of light could be as low as 25-30mW.

In this thread somewhere Howardlong and me have both tried to create subharmonics in the air by mixing 2 40kHzs 1 or 2kHz apart, and neither of us could hear anything for some reason, I checked with a very close EMC that they were mixing, there seems to be more to it than just 2 cleanly mixed 40kHzs.


--- Quote from: EEVblog on January 14, 2019, 11:06:00 pm ---So what is this "Burst circuit"?
--- End quote ---

I dunno, a guess is it's something to do with powering 4 receivers at the same time.

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