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The uBeam FAQ

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LapTop006:

--- Quote from: Howardlong on March 17, 2019, 03:43:04 pm ---
--- Quote from: LapTop006 on March 17, 2019, 05:45:41 am ---
--- Quote from: Howardlong on March 13, 2019, 10:53:55 pm ---Can you run Linux in under a watt? Or do you need a wall charger for that bit?

--- End quote ---

Easily. A PocketBeagle can idle at about half a watt. Actual usage is more like 3W however.

--- End quote ---

Half a watt idle? You could go to the moon and back on that!

I guess I need to spend more time outside of my nanoamp world.

--- End quote ---

That's without significant effort towards power optimisation too. I'm sure there's more efficient systems out there, in fact I suspect once you exclude the screen backlight & wifi chip my laptop doesn't idle at much more than that.

coppice:

--- Quote from: LapTop006 on March 17, 2019, 05:45:41 am ---
--- Quote from: Howardlong on March 13, 2019, 10:53:55 pm ---Can you run Linux in under a watt? Or do you need a wall charger for that bit?

--- End quote ---

Easily. A PocketBeagle can idle at about half a watt. Actual usage is more like 3W however.

--- End quote ---
You can make Linux systems that idle at very low power levels. If they only need to conduct short bursts of activity, you can get them to run at quite a low average power level, and use capacitors to smooth out the energy demands from the supply. The problem in applications where the supply is weak is trying to get them to boot, because that requires quite a long sustained burst of activity. I haven't seen a system that can effectively spread out the boot process, to avoid high energy demands. It might not be that useful, anyway, if the boot process ends up taking an hour or more.

jrs45:
https://www.bloomberg.com/news/features/2019-03-19/a-harvard-dropout-s-plan-to-fix-college-admissions-with-video-games


--- Quote ---“It’s something we’ve discussed, how much less scrutiny we would face if we were men, how much more implicit trust you’d get. But there’s nothing you can do about it, and talking about it makes you sound kind of silly,” says Meredith Perry, founder of the wireless technology startup UBeam..."
--- End quote ---

It's remarkable that she makes this claim, given the amount of investor money she was able to raise without any evidence of a working technology whatsoever.  Seems that she had an abundance of "implicit trust".

Cyberdragon:
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Howardlong:
The lack of self awareness is stunning. Does she really think she'd have had the opportunity to spaff all those millions had she been one of the awkward male linear thinkers on the autism spectrum who she loves to berate? The value proposition had little to do with her yet to be invented invention, a bit to do with her being mouthy, and a lot to do with her ticking a few diversity boxes that the VCs were under pressure to deliver on.

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