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  • FIRST POST
    • 50Twuncle
    • By 50Twuncle 14th Oct 16, 2:09 PM
    • 6,711Posts
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    50Twuncle
    Buzzing dimmer swtches
    • #1
    • 14th Oct 16, 2:09 PM
    Buzzing dimmer swtches 14th Oct 16 at 2:09 PM
    Do ALL dimmer switches buzz ?
    Just changed one - the OH was complaining about the noisy buzzing (I couldn't hear it !!) and the replacement is exactly the same !!
Page 1
    • FreeBear
    • By FreeBear 14th Oct 16, 2:26 PM
    • 686 Posts
    • 1,240 Thanks
    FreeBear
    • #2
    • 14th Oct 16, 2:26 PM
    • #2
    • 14th Oct 16, 2:26 PM
    Do ALL dimmer switches buzz ?
    Originally posted by 50Twuncle
    No they don't. If you have something that is buzzing, the most likely cause is a transformer (or inductor) with a loose winding or lamination. Usually, these things are soaked in a resin and then baked to harden it.
    So many cats, so few good recipes.

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    • lstar337
    • By lstar337 14th Oct 16, 2:41 PM
    • 2,871 Posts
    • 1,470 Thanks
    lstar337
    • #3
    • 14th Oct 16, 2:41 PM
    • #3
    • 14th Oct 16, 2:41 PM
    Not all, but most. Almost every dimmer I have ever come across has made a buzzing noise of some sort, especially when dimmed. I can't stand the things for this reason.

    Modern units designed for LED/Compact Fluorescent may be different, I've never used those.
    • casper_g
    • By casper_g 14th Oct 16, 3:00 PM
    • 944 Posts
    • 824 Thanks
    casper_g
    • #4
    • 14th Oct 16, 3:00 PM
    • #4
    • 14th Oct 16, 3:00 PM
    Look for a "trailing-edge" dimmer or "reverse phase dimmer", often sold as good for LED lighting.

    From http://www.lyco.co.uk/advice/dimmers-trailing-edge-v-leading-edge/

    Trailing-edge dimmers are more sophisticated than leading-edge dimmers, and usually use a MOSFET (Metal Oxide Semiconductor Field Effect Transistor) or IGBT (Insulated Gate Bipolar Transistor) switch rather than a TRIAC and coil. This benefits the user with smooth, silent dimming control, absent of any buzzing noise.
    Last edited by casper_g; 14-10-2016 at 3:02 PM.
    • Saver-upper
    • By Saver-upper 14th Oct 16, 6:04 PM
    • 1,261 Posts
    • 9,569 Thanks
    Saver-upper
    • #5
    • 14th Oct 16, 6:04 PM
    • #5
    • 14th Oct 16, 6:04 PM
    The only dimmer switch we have in the house has buzzed for the whole 16 years we have lived here.
    Roadkill Rebel #14,2016:£34.79 £12,000in2016 #82=£2313
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