Re:Fire alarm audio detection, using FFTs and 184 lines of Go
by ashleyn on Sunday April 07, 2024 @03:21PM
(#39963062)
These projects exist because modding life-critical safety equipment is usually not the best idea. You invalidate the testing originally put into the product, and it may fail when you most need it.
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Re:Fire alarm audio detection, using FFTs and 184 lines of Go
by wongarsu on Sunday April 07, 2024 @04:12PM
(#39963479)
Then put up two fire alarms, one unmodified and one where you replace the speaker with an Arduino that does whatever you want with the signal. They only cost $10 a piece. Or I guess buy one with wifi or zigbee connectivity, but then you don't have a project anymore.
Re:Fire alarm audio detection, using FFTs and 184 lines of Go
by morpheuskafka on Sunday April 07, 2024 @04:20PM
(#39963546)
Yeah, everything that touches them needs to be UL listed. Commercial alarm panels have approved relay modules that can be used to output to various unregulated devices without affecting the electronics inside the panel for this reason. They also use cellular now and have to use a special modem that is UL-listed to connect.