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  • FIRST POST
    • 50Twuncle
    • By 50Twuncle 14th Oct 16, 2:09 PM
    • 7,847Posts
    • 1,814Thanks
    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
    • 1,375 Posts
    • 1,941 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.
    Her courage will change the world.

    Treasure the moments that you have. Savour them for as long as you can for they will never come back again.
    • lstar337
    • By lstar337 14th Oct 16, 2:41 PM
    • 3,262 Posts
    • 1,756 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
    • 1,047 Posts
    • 902 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
    • 1,652 Posts
    • 12,594 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:£35.50 £12,000in2016 #82=£3163
    SPC #155 x 7.SPC7=£751.10 SPC8=£651.04 SPC9=£843.00 SPC10=£872.76
    Pinecone £292,Valued Opinions £10.50




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