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Q. electronic mist?

Discussion in 'Electronic Design' started by Peter Lowrie, Oct 31, 2003.

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  1. Peter Lowrie

    Peter Lowrie Guest

    I was in the garden shop and i saw this little thingy that produces a fine
    mist as it sits in water. My guess is that it's ultrasonic and probably a
    piezo. Can someone please tell us if this is the case AND what frequency
    would it be producing to make the water rise as mist?

    TIA

    :) Peter Lowrie
     
  2. Around 1-2MHz

    Best regards,
    Spehro Pefhany
     
  3. Cool, i want to make one. Do they require much power into the piezo spkr?
     
  4. John Hall

    John Hall Guest

    just be aware that these gizmos have potentially troublesome side
    effects...

    If your water has dissolved solids (look for scale in your kettle),
    these form a _very_ fine dust when the fine water droplets evaporate.
    This dust can work it's way into, e.g., CD player optics.
    You can, of course, fill them with de-mineralised water rather than
    tap water.
     
  5. Probably a few watts. The piezo element is much thicker than the
    typical audio type.

    Best regards,
    Spehro Pefhany
     
  6. Dave VanHorn

    Dave VanHorn Guest

    The DeVilBiss units I used to work on, were 1W.
     
  7. Elephant

    Elephant Guest

    just be aware that these gizmos have potentially troublesome side
    I bought one of those. What a mistake. Turned it on in the morning
    and when I got home from work, couldn't see across the room!
    Seriously! My apartment was filled with a white thick air that I
    litteraly could not see across the room. Furniture was covered with
    a thick white powder. Took forever to clean up.

    I threw that sucker away, fast!
     
  8. Peter Lowrie

    Peter Lowrie Guest

    No it's really simple. Looks like you need a multivibrator and small amp and
    a 9V supply.

    :) Peter Lowrie
     
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