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A comment on Open source laser microphone picks up laptop keystrokes. Parent comment

Re:Open source laser microphone picks up laptop keystrokes by codetrotter on Monday August 12, 2024 @10:34PM (#41231633)
Is the amount of power needed for the laser lower than the amount of power a USB-keyboard, or a Bluetooth connected keyboard needs?

Either way, I’m all for laser monitored keyboard. If nothing else then just for the reactions of others when I bring my laptop and a USB-corded keyboard and start typing on the external keyboard without plugging it in :)

(Although I guess, there’s a pretty high chance they will just assume that the keyboard simply has Bluetooth and that that is how it’s working even though not plugged in.)

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Re:Open source laser microphone picks up laptop keystrokes by albert_e on Tuesday August 13, 2024 @12:55AM (#41232389)
alternate technology:

take out a blank sheet of paper, draw a game pad with controls, start playing a game on screen by tapping those buttons you just drew

edit:

combine ..

Gestures from Apple Vision Pro

GenAI capabilities that can convert a sketch into a working web page

Smart Home automation

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Re:Open source laser microphone picks up laptop keystrokes by giancarlostoro on Tuesday August 13, 2024 @10:42AM (#41235952)
MakeyMakey from 2014? Would let you setup a gamepad you drew on paper with a pencil. Though it is wired, still impressive.

https://makeymakey.com/

https://www.bbc.com/news/technology-18303012

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Re:Open source laser microphone picks up laptop keystrokes by BobaFloutist on Tuesday August 13, 2024 @12:39PM (#41237035)
> Is the amount of power needed for the laser lower than the amount of power a USB-keyboard, or a Bluetooth connected keyboard needs?

I think the point is that the keyboard itself needs 0 power, so it doesn't ever need to be tethered, recharged, have batteries replaced, etc.

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