Localizing the smoke detector with the bad battery
Confused when trying to find the beeping smoke detector?
Problem: Localizing the fire alarm with the bad battery
Small home fire alarms emit a short signal every so often when the battery charge is low. This signal is very difficult to localize, after the fact, especially if one has more than one fire alarm.
Embodiment: Repeat the low battery signal at short intervals once or more times after the initial signal
Instead of making the signal emitted a single beep, include a circuit that repeats the signal at least once after a preset short (30 seconds, for example) delay. This will allow the user to easier locate which fire alarm needs a new battery
By Eugen Tarnow, PhD (MIT)
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