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A comment on Researchers use tiny magnetic swirls to generate true random numbers. Parent comment

Re:Researchers use tiny magnetic swirls to generate true ran... by orhmeh09 on Wednesday February 09, 2022 @08:11PM (#30281214)
There’s room for another solution, especially if it could someday lead to a product sold for under $1500.
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Re:Researchers use tiny magnetic swirls to generate true ran... by ncmncm on Wednesday February 09, 2022 @10:05PM (#30281960)
A cellphone camera is, what, $5? Maybe you already have one. Or an audio input jack you can crank up the gain on. Maybe a radio transceiver, like for wifi or bluetooth?

All our gadgets already have sources for way more truly random bits than we could ever find a use for.

If you feel you really need to build something from scratch, resistor thermal noise is random. Likewise, diode shot noise. Total parts cost for either is well under $1. Combine them if you like; you are still well under $1.

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