I think that will be handled by the AC to DC conversion in most systems. | Hacker News

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		kumarvvr 6 months ago \| parent \| context \| favorite \| on: Hiding secret codes in light protects against fake... I think that will be handled by the AC to DC conversion in most systems.

4gotunameagain 6 months ago [–]

Nope. Mains hum is picked up by microphones as well as light intensity:

https://en.wikipedia.org/wiki/Electrical_network_frequency_a...

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