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New ‘negative light’ technology hides data transfers in plain sight
(www.unsw.edu.au)
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this post was submitted on 14 Mar 2026
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My newish Xiaomi has an IR diode which is very useful to switch the AC on or off when I can't be bothered to find the remote, and to mute TVs in restaurants.
It has a 3.5mm audio jack too.
I used to love turning town loud TVs in bars back when IR blasters were common.