need more help with sound trigger

Discussion in 'The Projects Forum' started by gvi70000, Nov 1, 2009.

  1. gvi70000

    Thread Starter Active Member

    Oct 4, 2009
    34
    0
    hello,
    I need to trigger a camera using the sound made by the splash of a drop of water. The sound is picked up using a electret mic placed at about 20-30 cm from the sound source.
    The best i could think of is posted here http://forum.allaboutcircuits.com/showthread.php?t=29246 but with this design i have to place the mic too close at about 2 cm from the sound source
    I also need to adjust the level at witch the camera is triggered (for popping balloons or water drops).
    Can anyone help me to achieve this?

    PS: I've uploaded two picture with the results I've got so far
     
    Last edited: Nov 1, 2009
  2. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Where are you getting the 1.5V that appears at pin 3 on the opamp?

    hgmjr
     
  3. gvi70000

    Thread Starter Active Member

    Oct 4, 2009
    34
    0
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