LED FAQs

Discussion in 'LED Aquarium Lighting' started by Rapid LED, Sep 30, 2010.

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  1. cdgardner11

    cdgardner11 Spanish Shawl Nudibranch

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    So if you bought the kit from you with the XP-G and the blue XP-E do you need to adjust the ELN driver? I am kind of confused on this point. :confused:
     
    Last edited: Oct 1, 2010
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  3. Rapid LED

    Rapid LED 3reef Sponsor

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    If you're running XR-E's (or XP-E's) you should adjust the SVR2 knob down under 1A. This will ensure the LEDs never get more than 1A from the driver, regardless of what type of controller is being used. For XP-G's, the maximum current they can handle is 1.5A so that can be left alone.
     
  4. cdgardner11

    cdgardner11 Spanish Shawl Nudibranch

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    Thanks for the help. On a side note, just got 12 of these hooked up and wow are they bright. The XP-G's are the brightest things ever. I had to turn them off for fear of eye damage. :cheesy:
     
  5. cdgardner11

    cdgardner11 Spanish Shawl Nudibranch

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    Another question, what potentiometer is everyone using? The one I got will not dim the lights. It does allow them to come on, but I have no control over dim functions.

    There were like 50 different ones at Frys Electronics, so I have no idea if I have the right one. :confused:
     
  6. Takitaj

    Takitaj Spanish Shawl Nudibranch

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    Connect it like this

    [​IMG]
     
    Last edited: Oct 3, 2010
  7. Takitaj

    Takitaj Spanish Shawl Nudibranch

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    Guys, I'm really sorry. The previous drawing was incorrect, the current one is correct. I was half asleep when I did it. ::)
     
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  9. Rapid LED

    Rapid LED 3reef Sponsor

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    We get a ton of questions about using dimmable drivers, so here are a few more FAQ's to add onto the list:

    Q: I am trying to adjust the V (voltage) and I (current) of my driver but I am getting inaccurate results when I turn SVR2.
    A: The driver must have a load. Without a load you cannot measure the current or voltage output of the driver accurately. Connect the minimum # of LEDs to the driver before attempting any measurements.

    Q: What is the minimum # of LEDs for my driver?
    A: ELN-40-48-D: 8 LEDs
    ELN-60-48-P: 8 LEDs
    LPC-35-700: 3 LEDs
    (Assuming you're using 3W CREE LEDs. Otherwise please see our original post for how to calculate minimum loads)


    Q: What do SVR1 and SVR2 do on my D or P model driver?
    A: SVR1 adjusts maximum voltage. SVR2 adjusts maximum current.

    Q: Can I run my D or P model driver without a dimming control unit (ie. potentiometer or PWM controller)?

    A: Yes, attach a constant voltage power source of 10V (a wall wart will work) to the driver and set SVR2 to your desired output current. It's kind of the poor man's way to dim but it will work.
     
  10. geroge

    geroge Plankton

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    Very useful info, I bookmark it and can take a reference for future. Thank you.
     
  11. MichaelKelley

    MichaelKelley Banned

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    Thanks for sharing this information, though i knew few but most are new to me :)
     
  12. stepho

    stepho Panda Puffer

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    Does the PWM signal need to be 10v or will a 5v signal, like arduino uses, work?