Wiring 3x5m white LED strip in parallel - how much power and where does the dimmer go?

Discussion in 'Home Cinema Buying & Building' started by MakkaAus, Feb 13, 2014.

  1. MakkaAus

    MakkaAus
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    Hi All,
    I am looking to put 3x5m strip lights on top of a picture rail to light up 3 walls of my living room.
    I have 2 questions on how to set this up:
    I've attached a diagram of how I think it could work, I'm just not sure whether I have the right transformer
     

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  2. supraTTman

    supraTTman
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    Let's go back to basics before we start talking RGB amplifiers and a massive 30A power supply that has a noisy fan for cooling!

    If you need 60 LED/m white strips rather than 30 LED/m then there is a big difference in cost & complexity for a wall-plate controller driving 15m of LED strip. 30/m is usually more than adequate if the reflecting surface is white or pale.
     
  3. MakkaAus

    MakkaAus
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    Thanks for your quick reply SupraTTman, I already have the strips - they are 60LED/m. I'm assuming this will be a larger Amp draw then.
    What is your suggestion for a PSU and dimming solution?
    Cheers
    MakkaAus
     
  4. supraTTman

    supraTTman
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    Ah OK.
    A 5m 60/m strip is rated at 72W=6A. In practice they seldom draw more than 4 - 4.5A.
    A wall-plate 12V dimmer will be rated at 6-8A, which is fine for one 5m strip. So you will need an RGB amplifier rated at 18A (6A/channel) to drive the other two 5m strips. A 20A psu will be OK - and these are silent (=fan-less).
     
  5. MakkaAus

    MakkaAus
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    OK - thanks for that, so by using the combo of 20a psu>dimmer>strip 1>amplifier> strip 2>strip 3 we don't need to parallel wire each strip. so to use the rgb amplifier, I just use +ve and 1 channel of the amp?
    I'll put a diagram together when I have 5 mins.
    cheers again

    Lee
     
  6. supraTTman

    supraTTman
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    Yes that's right - as described in this thread. Just connect the dimmer output to 2 of the R G or B inputs along with V+
     
  7. MakkaAus

    MakkaAus
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    Great - thanks for all the advice!
    I'll give this a go.
     

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