Show HN: Alzheimer's Buddy: Use Flashing Light and Sound at 40Hz

Re:Show HN: Alzheimer's Buddy: Use Flashing Light and Sound ... by monkey_monkey on Friday January 26, 2024 @09:03AM (#39142665)

Just a warning - running this for a few seconds has left my secondary display with an ongoing flicker which seems to be improving after 10 minutes and a reboot.

[edit to add] 10 minutes later - the flicker has gone (or I can't perceive it)

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Re:Show HN: Alzheimer's Buddy: Use Flashing Light and Sound ... by kkwtflz on Friday January 26, 2024 @09:52AM (#39143244)

Same on my Dell. What seems to stop it is turning off HDR and back on again (using the monitor's OSD menu)

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Re:Show HN: Alzheimer's Buddy: Use Flashing Light and Sound ... by samzub on Friday January 26, 2024 @09:29AM (#39142973)

Same here, on a Dell P2421DC (2560 x 1440 @60 Hz). It is especially noticeable on darker colors (grey or black backgrounds).

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Re:Show HN: Alzheimer's Buddy: Use Flashing Light and Sound ... by matei88 on Friday January 26, 2024 @10:00AM (#39143347)

found that something like this fixes it https://youtu.be/t6jlhqNxRYk?feature=shared&t=8468 play it in full screen for a few seconds

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Re:Show HN: Alzheimer's Buddy: Use Flashing Light and Sound ... by t0mek on Friday January 26, 2024 @09:29AM (#39142967)

Same with Dell P3223QE.

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Re:Show HN: Alzheimer's Buddy: Use Flashing Light and Sound ... by serf on Friday January 26, 2024 @09:11AM (#39142751)

yeah that happened here too. Was it an LG?

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Re:Show HN: Alzheimer's Buddy: Use Flashing Light and Sound ... by monkey_monkey on Friday January 26, 2024 @09:12AM (#39142758)

Yes! It's an LG Ultra HD running at 2560x1440 @ 60Hz

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Re:Show HN: Alzheimer's Buddy: Use Flashing Light and Sound ... by serf on Friday January 26, 2024 @09:22AM (#39142874)

Same monitor here. Damn strange. I'd experiment more if I didn't need to work with it. Keeping the monitor off for awhile seemed to help , but a quick off/on didn't.

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Re:Show HN: Alzheimer's Buddy: Use Flashing Light and Sound ... by monkey_monkey on Friday January 26, 2024 @09:24AM (#39142910)

Yup, I turned it off, disconnected it from my Mac and left it for a minute, then rebooted. All seems fine now.

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Re:Show HN: Alzheimer's Buddy: Use Flashing Light and Sound ... by mensetmanusman on Friday January 26, 2024 @12:53PM (#39145496)

Capacitors needed to relax...

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Re:Show HN: Alzheimer's Buddy: Use Flashing Light and Sound ... by seydor on Friday January 26, 2024 @09:16AM (#39142802)

Same with an LG running at 2560x1080

Now what is causing it?

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