r/deaf • u/StreetCollege6318 • 6h ago
Technology built a $15 device that flashes when your smoke alarm goes off — for people who can't hear the beep
I read that the American Red Cross gets flooded with requests for bed-shaker/strobe alarms for deaf and HoH households, but they cost $250–300 and they can only install a handful a year. After one local news story, 200 households requested one.
So I made a cheaper version. It's a tiny computer (a micro:bit) that just listens for the smoke alarm's beep and flashes a bright strobe when it hears it. It works with whatever alarm is already on your ceiling — no pairing, no special transmitter — because every US smoke alarm is legally required to beep in the same rhythm.
Being honest: this is a prototype, not a certified product. It is NOT UL-listed (that costs tens of thousands of dollars) so it should be used alongside a real alarm, never instead of one. I'm a high school student and I'm sharing it open-source in case it's useful or someone wants to build on it.
Would love feedback from people who actually use strobe/shaker alarms — what works, what doesn't, what I'm missing.