ADHD Focus Light
Two 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…
In plain words
ADHD Focus Light is a firmware implementation for the M5StickC Plus2 that displays a blinking LED pattern, starting at 120 beats per minute and gradually slowing to 60 bpm, intended to help users enter a focused state. Designed for people with ADHD seeking alternative focus techniques, it features configurable ramp-down timing and auto-sleep functionality. The creator adapted an existing open-source implementation and built the entire project using AI assistance, though effectiveness remains unverified through personal testing.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Two 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 original codebase, to modifying the firmware, to flashing the device. There's something surreal about an AI having full control over a physical piece of hardware. It made me wonder: in the future, could AI-connected devices dynamically rewrite their own firmware based on user needs? Imagine telling your device "make this button do X instead" and it just... does. Original HN comment: https://news.ycombinator.com/item?id=38274782 Based on: https://github.com/Qiaogun/ADHD_Blink Hardware: M5StickC Plus2 (~$20) Happy to hear thoughts, or if anyone has actually tried this LED trick.
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