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A comment on With a simple piece of paper, engineers create self-powered, wireless keyboard. Parent comment

Re:With a simple piece of paper, engineers create self-power... by eikenberry on Sunday September 06, 2020 @05:12PM (#24394713)
I was expecting different click-bait, like a keyboard drawn on paper with a camera pointed at it or something.
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Re:With a simple piece of paper, engineers create self-power... by skc on Monday September 07, 2020 @04:10AM (#24397566)
Me too, and probably possible as hack that any decent developer can do right now.

In fact when camera enabled glasses looked like they were going to be a thing that was the very thing I imagined taking off. You grab a piece of paper and haphazardly draw a bunch of keys on it and your glasses with a little AI do the rest

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Re:With a simple piece of paper, engineers create self-power... by Izkata on Sunday September 06, 2020 @07:27PM (#24395492)
How about a laser-projection bluetooth keyboard?

https://www.youtube.com/watch?v=xmKdtAePxy8

They've been available for a few years now.

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Re:With a simple piece of paper, engineers create self-power... by gertlex on Sunday September 06, 2020 @09:16PM (#24395936)
Fun fact: they've been available for over a decade at this point. I wouldn't be surprised if it goes back a few years more than this 2008 article. Never personally used one, though.

https://www.geeky-gadgets.com/geeky-gadgets-the-bluetooth-la...

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Re:With a simple piece of paper, engineers create self-power... by freeone3000 on Sunday September 06, 2020 @11:47PM (#24396475)
Ain't great. You can only type certain keys at a time since the beam-break for j prevents a follow-up n in the denounce period. I only get about 30wpm... Disregarding feedback.
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Re:With a simple piece of paper, engineers create self-power... by cgriswald on Monday September 07, 2020 @02:32AM (#24397075)
It could probably be done now just by looking at hand shapes and if you’re a touch typist you might not even need the projection, just a dot or two (which could just be stickers on a surface) to orientate your hands over nothing.
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Re:With a simple piece of paper, engineers create self-power... by freeone3000 on Tuesday September 08, 2020 @11:58AM (#24409659)
Hand shapes for typing are far from standardized or recognisable. Nowhere near the accuracy a laser beam break gives you. (The projection LED is separate from the detection laser, which is much lower power)
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