Electronic Steam Whistle

Discussion in 'General Electronics Chat' started by czars, Apr 30, 2010.

  1. czars

    Thread Starter New Member

    Jul 9, 2009
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    Does anyone have a circuit for a two or three tone steam whistle generator?
     
  2. retched

    AAC Fanatic!

    Dec 5, 2009
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    A little clairification please.? So you just want a synth to sound like a steam whistle

    or a steam whistle operator?
     
  3. czars

    Thread Starter New Member

    Jul 9, 2009
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    I want to use an electronic circuit to create a steam whistle sound when I close a switch.
     
  4. retched

    AAC Fanatic!

    Dec 5, 2009
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    Im sure they are around. The model railroading community HAS to have these for the scapes.

    Thing is, how LOUD are you talking?

    Just something for a model railroad? or do you want somthing ala Flintstones "Im outta here" - "Quittin' time" 180+ db loud?
     
  5. czars

    Thread Starter New Member

    Jul 9, 2009
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    Amplitude doesn't matter. I can always amplify the signal.
     
  6. tracecom

    AAC Fanatic!

    Apr 16, 2010
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    I know that you asked for a circuit and this is not a direct answer to your question, but Velleman makes a kit (MK134) that generates the sound of a steam engine and includes a whistle switch. Velleman publishes the schematic for most (if not all) of their kits.
     
  7. SgtWookie

    Expert

    Jul 17, 2007
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    Have you seen this article?

    http://www.epanorama.rackhost.net/s...hesizers/Model Railroad Sound Synthesizer.pdf

    It's been around for quite awhile (1977) but you could have fun building it.

    You could substitute a 2N3904 or 2N2222 for the 2N2712 transistors shown.

    [eta]
    I decided to throw a portion of the circuit into a simulator, and thus far I'm not impressed. There are some obvious errors around the 555 timer.
     
    Last edited: Apr 30, 2010
  8. SgtWookie

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    The Velleman kit is easy to put together. The sounds are really pretty decent for what it is, depending on your output sound system.
     
  9. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    In the attached PDF you will also find a small schematic on the second page.

    Bertus
     
  10. czars

    Thread Starter New Member

    Jul 9, 2009
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    Thanks for the inputs.

    The MK134 has a pretty good chuff sound, but the whistle is a single frequency tome and doesn't sound very good.

    I'll try the others that were suggested.
     
  11. someonesdad

    Senior Member

    Jul 7, 2009
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    I know it's a bit off topic, but if you REALLY want to make a real steam whistle, there are plans for a Lunkheimer in Guy Lautard's "Machinist Bedside Reader", vol 2, pg 134. IIRC, it didn't look too hard -- mostly straightforward lathe work...
     
  12. SgtWookie

    Expert

    Jul 17, 2007
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