I'm interested in creating a fire department alerting system with the input as sound to signal the relay and the output to turn on the LED light. Here is another YouTube video from another person. https://youtu.be/d7Kepcw-4g8?si=dhQpdQG9ML9T_b0U
Actually, I am more interested in what you, personally, want to build. Please continue with your discussion.
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Nice idea. I would start by breaking it down into subsystems and prototype each subsystem and get it working before combining them. You have to detect audio, should define it, button, and what else for inputs. Outputs appear straight forward, probably solid state relays.
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