Hacked Gadgets Forum

October 10, 2009

Hidden Sound Trigger

at 2:44 pm. Filed under DIY Hacks, Electronic Hacks


Bumblebeepee from the Hacked Gadgets Forum entered the Halloween Project Contest with this cool Hidden Sound Trigger contraption. He used an infrared beam to detect when someone enters the target area, the buzzer output of the beam module presses play on an mp3 player which is amplified to drive some speakers and scare someone. This year he is working with the same module to play some music and light up a pumpkin when someone walks up. Halloween is sure to be a fun time in that yard!


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4 Responses to “Hidden Sound Trigger”

  1. Davin Peterson Says:

    The player pictured above is a Creative Zen Vision:M, which is better than an iPod

  2. ramakandra Says:

    …let’s not kid ourselves….
    …Creative is dead…
    …iPod is the way forward…

  3. Ed Says:

    How exactly did you get buzzer output to press play on the mp3 please?? plus exactly what are the modules? Would be great if you could help me trying something out for a sound installation piece…

    Cheers! Ed

  4. Alan Parekh Says:

    Hi Ed,

    There doesn’t seem to be all the details here. Those modules are made by Velleman, a kit manufacturer. I would think a transistor and a smoothing cap were used but I am not sure.

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