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electric horn

Discussion in 'Beginner Electronics' started by seadog2, Aug 29, 2006.

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  1. seadog2

    seadog2 Guest

    Hello all, I'm searching for a circuit diagramme (schematic) to
    emulate the old 1920's type electro mechanical car horn. You know the
    type, Elliot Ness and old London Taxis sort of thing. Sort of went'
    AhhhOOooGah'. Any help appreciated that does not involve simply using a
    sound-chip. Transistors or IC's not a problem. Hopeful. Cdog.
  2. jasen

    jasen Guest

    AFAIK called a "Klaxon"

    good luck.
  3. Bjorn

    Bjorn Guest

    That's a fairly complex sound. I'd suspect an analog circuit could
    become very complex as the trueness of sound is increased. Many question
    come to mind: how small?, how loud?, how much power?, money?, time? If
    mechanical is out of the picture, I'd go digital. First thought is the
    easy way: use a Winbond Chipcorder (ISD1110 maybe) - borrow or buy a
    horn, record it onto the chip then play it trough your choice of
    driver/speaker - just remember, you will need a lot of overhead to
    accommodate the dynamics. I'm not even sure that chip can hanldle that
    range. Non-linear companding and expansion may be needed which could
    hurt the fidility. Bandwidth is poor too but it may be OK.
    Another possibility is to synth it with either a DSP/DAC or a
    microcontroller driving a Yamaha MIDI chip, perhaps a pull from an old
    SB16. This has the ponential to sound very nice, depending on
    programming and you can actively control the blast length.
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