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Looking for a buzzer

Discussion in 'Electronic Components' started by ehsjr, Jun 13, 2007.

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  1. ehsjr

    ehsjr Guest

    I need a 16 Vac 7/8" diameter buzzer - electromagnetic,
    NOT a piezo. Any idea where I can get one?

    Thanks,
    Ed
     
  2. Paul Luggar

    Paul Luggar Guest

    I used to work on door entry systems that used AC buzzers like this, may be
    a place to start looking?

    --



    Paul Luggar

    M0SCI

    Website WWW.M0SCI.CO.UK

    Amsat-UK Member 6484

    www.m0sci.co.uk/forum Devon and Cornwalls Amateur Radio Message Board
     
  3. Al

    Al Guest

    You could make one easily from a small relay. Put the coil in series
    with the relay contacts and your voltage source. Affix a diaphram to the
    armataure to increase the area so that the buzz is louder. It also makes
    a lot of radio interference.

    Al
     
  4. ehsjr

    ehsjr Guest

    Thanks Paul, I'll try that.

    Ed
     
  5. ehsjr

    ehsjr Guest

    Thanks Al, I hadn't thought about modifying a relay.
    Might be a good idea.

    Ed
     
  6. Paul Luggar

    Paul Luggar Guest

    If you use a DC relay on an AC signal it will rattle without modification!
    (;-)

    --



    Paul Luggar

    M0SCI

    Website WWW.M0SCI.CO.UK

    Amsat-UK Member 6484

    www.m0sci.co.uk/forum Devon and Cornwalls Amateur Radio Message Board
     
  7. Al

    Al Guest

    I am using an old GE buzzer, dated 1976, that has three terminals on it.
    A common, a connection for DC voltage, and a connection for AC voltage.
    I traced the wiring and found that the DC route is through a set of
    contacts that are in series with the coil. The AC route bypasses the
    relay contacts as described by the top-poster above. BTW, the packaging
    for this buzzer says it was printed in England. Odd, but maybe the
    buzzer was made in England also.

    Al
     
  8. ehsjr

    ehsjr Guest

    Yes - but not loud enough. The mod would be to somehow affix
    a diaphram as Al suggested. I wouldn't energize it through
    its own contact - that's likely to destroy the contact sooner
    or later, which would defeat the thing.

    Ed
     
  9. ehsjr

    ehsjr Guest

    Update - I finally got the buzzer the day before yesterday.
    I found a place that does door entry (thanks to your reply),
    & ordered their buzzer almost two months ago. There was some
    kind of snafu - they thought they had shipped the thing but
    they didn't. Anyway, all's well that ends well. Thanks again.

    Ed
     
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