Alzheimer's Buddy: Use Flashing Light and Sound at 40Hz
I recently learned about some fascinating research done at MIT for potentially treating Alzheimer’s using light and sound stimulation at 40 hertz. Nothing has been proven yet, but it seemed compelling to me, especially given the safety and simplicity of the treatment (i.e., no drugs, no electrodes, just looking at light and hearing sounds). I wanted to try it myself, but was surprised how hard it was to find something free and easy to use to generate such pulses. Which is odd because I remember some freeware DOS program I tried back in the 90s which did all this kind of stuff (anyone know…
Alzheimer's Buddy: Use Flashing Light and Sound at 40Hz launched on January 26, 2024 with 96 votes, #647 of 4,437 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 2 years on.
In plain words
Alzheimer's Buddy generates flashing light and sound stimulation at 40 hertz, based on MIT research exploring this frequency's potential effects on Alzheimer's disease. The tool is designed for older adults interested in experimenting with this non-invasive treatment approach, requiring only a screen and speakers. It offers a free, accessible alternative to expensive medical equipment, with no drugs or electrodes involved. The application was created to make this experimental treatment available to people outside of formal clinical trials.
written from the facts on this page · September 2026
From the sources
Is this a joke? Believe it or not, there is new research that suggests this sort of therapy actually works. See these links for more information: WARNING: If you have epilepsy, or someone you live with does, be very careful using this! WARNING: Some users have reported that their computer monitor acted weird after running this, and if you have any doubts about this, you should use it on a smartphone instead! I can verify that it works well on a recent iPhone without damage. Come on, this must be a joke, right? No, really. Think about it— your eyes take in light which stimulates your retina, which sends pulses through your optical nerve, which is connected to... your brain! Your eyes are…from alzheimersbuddy.com
In the maker’s words, at launch
I recently learned about some fascinating research done at MIT for potentially treating Alzheimer’s using light and sound stimulation at 40 hertz. Nothing has been proven yet, but it seemed compelling to me, especially given the safety and simplicity of the treatment (i.e., no drugs, no electrodes, just looking at…
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ADHD Focus LightJan 2026 · github.com · ▲16Two years ago, someone on HN shared an interesting ADHD hack: a tiny LED that blinks at 120 bpm and gradually slows to 60 bpm, supposedly helping your brain sync and calm down into focus mode. I found Qiaogun's implementation (ADHD_Blink) for M5StickC Plus, and adapted it for the newer M5StickC Plus2 with some tweaks - simpler 50% duty cycle flash, configurable ramp-down, auto sleep, etc. Honestly, I'm not sure if it actually works. I'll be trying it out myself to see. But the building process itself was quite fascinating. I used Claude Code for the entire implementation - from reading the…
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