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There already exist wireless doorbells and smart home light switches that harness the energy of clicking the button using a piezo crystal to use for transmitting the signal. But at least the one I have has way too much resistance to use for a computer keyboard
Just because you can render a game using scripting doesn’t mean your script can escape the PDF reader.
You can build a fully working Turing machine inside PowerPoint, but without an exploit you are still not going to run code outside the PowerPoint environment