need help: water sensor/switch for audio playback

Discussion in 'The Projects Forum' started by sdvz, Sep 28, 2012.

  1. sdvz

    Thread Starter New Member

    Sep 28, 2012
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    0
    Hi everyone,


    I have an arduino uno and have coded it to detect when a piece of plastic is submerged in water. When submerged, a speaker plays a short audio clip one time and won't play it again until the plastic has left and re-entered the water.

    I detect the submersion by having 2 metal contacts in the plastic; basically 1 connected to 5V and the other to an input pin.

    Now I would like to accomplish this without a micro-controller. I figured this is possible since it's basically like a audio greeting card except for the switching/activation mechanism. Could you guys shed some light on my situation?... Maybe some suggestions/schematics? Thanks!

    SDVZ
     
  2. sdvz

    Thread Starter New Member

    Sep 28, 2012
    3
    0
    anyone?????????
     
  3. Dodgydave

    Distinguished Member

    Jun 22, 2012
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  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    Where does the audio clip come from?
     
  5. sdvz

    Thread Starter New Member

    Sep 28, 2012
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    0
    at my current stage, using the arduino uno, i downloaded an audio clip and converted it to numeric form. with a PCM library i downloaded for arduino ide, i can play it with my arduino uno + speaker.

    i know you can buy slide-tongue greeting card sound modules where you can record an audio clip, but im not sure how to interface this with a water sensor circuit. any ideas?

    link to sound modules: http://www.soundexpressiongreetings.com/musical-greetings/sound_modules.html
     
  6. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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