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A comment on Ask HN: Why is coil whine in electronics so prevalent?. Parent comment

Re:Ask HN: Why is coil whine in electronics so prevalent? by spython on Sunday November 06, 2022 @06:52PM (#33499032)
You can buy good LED drivers with up to around 20kHZ PWM, but even 800 hz is enough to not see the flicker anymore, though it will show up on a video camera as stripes. It's the cheap 250 hz drivers that are painful to the eyes.
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Re:Ask HN: Why is coil whine in electronics so prevalent? by spython on Sunday November 06, 2022 @07:49PM (#33499591)
Here's an example for a controller going up to 16 kHZ. http://www.iskydance.com/index.php?c=product_show&a=index&id... (no affiliation). Would need a DMX fader to control it though.
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Re:Ask HN: Why is coil whine in electronics so prevalent? by rahimnathwani on Monday November 07, 2022 @01:12AM (#33501813)
Can I buy wifi-enabled bulbs that use these?

I use TP-link Kasa color-changing bulbs (although I'd be happy with any that can change colour temperature between daylight and candlelight), and the flicker sometimes bothers me.

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