I have a idea to hook a car alarm up to a UNO R3 with a mp3 shield from sparkfun.com part #10628. I am not sure if this work. Most alarms make a chirp for arming and two chirps for disarming. Can i use the speaker output from the alarm system to signal a certain Mp3 to play from the UNO? I would use…

car alarm with MP3 sound

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