Hello guys, I purchased a new smoke sensor for my workshop, I really want to hook it up to my "smart home" monitoring system I made, my ideea was to connect a wire to the positive side of the buzzer, and make an volt divider if the voltage was to high (the smoke detector runs on 9v battery) ...BUT …

How to detect when an gas alarm piezo (self drive - 3 wires) buzzer is active?

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