Hello, I am currently looking at the feasability of a project involving playback of audio triggered by the presence of a person entering a 3m area. The sensor/arduino/playback device/loudspeaker would be packaged and put in a tree. When someone walks near the tree, the playback starts. I think I ca…

standalone proximity sensor trigering MP3 playback

system May 12, 2011, 9:31pm 4

I've had good luck with the mp3 trigger from Sparkfun, very easy to use:

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