this post was submitted on 06 Dec 2025
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What the fuck (lemmy.dbzer0.com)
submitted 7 hours ago by Stamets@lemmy.dbzer0.com to c/whitepeopletwitter@sh.itjust.works
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[–] abs_mess@lemmy.blahaj.zone 4 points 2 hours ago

Poorly shielded inductors in switch mode PSUs/old CRTs for me (Very common in older devices, low current causes the switching frequency to drop into the audible range.)

You can build your own tinnitus inducer with a cheapo 100kHz buck ic, put an air coil inductor on it, and then decrease the current until failure.