General > General Technical Chat
The uBeam FAQ
jrs45:
--- Quote from: PaulReynolds on February 11, 2019, 12:36:24 am ---Where hare-brained unrealistic schemes and exaggeration are the norm, and you are rarely held to account for prior promises, and being a 'victim' is a benefit?
--- End quote ---
Academia for sure. Or some of those blue-sky research labs (Google X, MERL, etc.) that never need to accomplish anything concrete.
PaulReynolds:
--- Quote from: jrs45 on February 11, 2019, 04:02:26 pm ---
Academia for sure. Or some of those blue-sky research labs (Google X, MERL, etc.) that never need to accomplish anything concrete.
--- End quote ---
That would require a level of technical skill beyond the ability to Google answers...
PaulReynolds:
--- Quote from: EEVblog on February 11, 2019, 01:38:50 pm ---I don't recall ever seeing this video, but maybe I have and I've forgotten. Perry with the prototype that looks like it has no tracking.
--- End quote ---
I've been out of that company for over 3 years and I still have to work up to watching videos with Perry in them. It sets me off. Like episodes of "Silicon Valley", I can't watch them because I've lived them, and it's not as funny when you've been through it...
The editing is so choppy it's really irritating. Maybe I'm old now. This was from Oct 2017, during the last fundraising round.
The LP guy says gained 8%? Let's say that was a 6Wh battery, so around 500 mWh, in a few minutes, let's say 5 (do you see him standing there holding it steady for that length? 5 minutes is a looooong time to do that for). That would mean 6W charging to the battery, which if they could do they should be screaming from the rooftops. Amazing that 15 months later they were simply lighting up LEDs in the mW range... It also implies >145dB sound pressure level as at 145 dB a square-on iPhone X sized object receives around 3W acoustic (prior to conversion to the battery). Possible that they just concentrate an extremely large array (looks to be about 45cm across), blast it, and focus to a single point. Still, I don't see those numbers adding up, something's not right. It's also interesting that the handheld LED device showed a rather wide "focus", with good beamforming you should be able to get that down to a few centimeters at that range, I'm suspicious it's very limited that way (concentric rings, by hex plate, or none at all and relies on the natural focus). I'd also love to see the grating lobes on that thing. No steering shown, ties with no tracking, it might not have been able to do it. I think I mentioned this in one of my blogs, but if I was going to "bamboozle" investors I'd have multiple transmitter/receiver sets and show different aspect of the technology in each and handwave the "we'll put it all together later".
Never operate out of fear? OMG I just about fell out of my chair laughing at that. Those of us on the receiving end of the "random dictat of the day" might have something to say there.
There were a lot of LA music types coming through the office when I was there. Nice people. These were not technically sophisticated investors.
sdpkom:
--- Quote ---The LP guy says gained 8%? Let's say that was a 6Wh battery, so around 500 mWh, in a few minutes, let's say 5 (do you see him standing there holding it steady for that length? 5 minutes is a looooong time to do that for). That would mean 6W charging to the battery, which if they could do they should be screaming from the rooftops. Amazing that 15 months later they were simply lighting up LEDs in the mW range... It also implies >145dB sound pressure level as at 145 dB a square-on iPhone X sized object receives around 3W acoustic (prior to conversion to the battery). Possible that they just concentrate an extremely large array (looks to be about 45cm across), blast it, and focus to a single point. Still, I don't see those numbers adding up, something's not right. It's also interesting that the handheld LED device showed a rather wide "focus", with good beamforming you should be able to get that down to a few centimeters at that range, I'm suspicious it's very limited that way (concentric rings, by hex plate, or none at all and relies on the natural focus). I'd also love to see the grating lobes on that thing. No steering shown, ties with no tracking, it might not have been able to do it. I think I mentioned this in one of my blogs, but if I was going to "bamboozle" investors I'd have multiple transmitter/receiver sets and show different aspect of the technology in each and handwave the "we'll put it all together later".
--- End quote ---
Or just put a pre-charged powerbank inside that huge "receiver".
EEVblog:
I just remembered the Youtube video of a couple of investors in uBeam doing a dance to celebrate that they got in on this Trillion Dollar Idea™
But I can't find it, anyone got a link?
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