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Transformers and Dimmers

Discussion in 'General Electronics Discussion' started by Blake Shaffer, Nov 12, 2014.

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  1. Blake Shaffer

    Blake Shaffer

    Jul 1, 2014
    Hello, I was thinking of getting an LED light strip to mount and would like it to be dimmable, I have an outlet with a dimmer switch connected to it. However would just any old transformer that works with the lights be acceptable, or do I need a certain "dimmable transformer", I don't believe I do but I would like to get a second opinion by someone who knows more than me, thanks!
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    The "transformers" used to power LEWD strips are not transformers these days. They are generally switchmode power supplies.

    An SMPS will react to a dimmer by increasing the current demand when power is on (the dimmer essentially turns the power on and off to the load) to maintain the output voltage (or current).

    Thus, you do indeed need a "dimmable" transformer.
  3. BobK


    Jan 5, 2010
  4. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    Nov 28, 2011
    Lewd? Who strips? Where?
    I guess that's what Steve meant. Either adjustable constant current or PWM.
    davenn likes this.
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