[Timezone Detection]
Create Account - Join in Seconds!

User Name: Email Address:
Human Verification

What type of fish is in the middle of CaptiveReefs (top left corner of page...hint it is the main character in Finding Nemo) )

dimming


Bookmark and Share
Results 1 to 4 of 4
  1. #1
    Corvette Reefer - Reefkeeper CR Member
    Join Date
    Nov 2009
    Location
    Dexter, Michigan
    Posts
    421

    Default dimming

    so i was just letting my brain wonder but i thought about this...you dont necessarily need a driver thats dimmable for your leds becuase you can by external type dimmers, almost anything would work...think of it like this, the ballast puts out just 48v dc with 1 amp, u just need a dimmer that can handle that, so anything would work. your could acually save money and just use a wall type plug and connect it straight to the dimmer and it would work. idk i was just playing around with this idea, maybe once i get my main led working again, ill get some cheap ebay bulbs and see what i can do.
    The names Vette, Corvette. . .

  2. #2
    evilc66 - Reefkeeper CR Member
    Join Date
    Jan 2010
    Location
    Shelby Twp. MI
    Posts
    297

    Default

    This is asking for trouble. Most of these so called "LED dimmers" you see on ebay are simple pwm choppers. This can wreak havok on the driver as it expects to get current feedback from the string of LEDs connected to it. As soon as you start to alter what the driver sees, it tries to over compensate, and can lead to some very odd results, if not damage to the driver, or the LEDs. These types of dimmers are for constant voltage situations, not constant current. They make dimmable drivers for a reason.

  3. #3
    Corvette Reefer - Reefkeeper CR Member
    Join Date
    Nov 2009
    Location
    Dexter, Michigan
    Posts
    421

    Default

    yeah i figured that, but i meant like if u didnt use a driver and just used a dc power supply to connect to the dimmer.
    The names Vette, Corvette. . .

  4. #4
    evilc66 - Reefkeeper CR Member
    Join Date
    Jan 2010
    Location
    Shelby Twp. MI
    Posts
    297

    Default

    At that point, you aren't driving the LEDs by constant current. You would have to very closely match the power supply voltage to the total LED forward voltage, and pick a power resistor of the right size to limit current. It's not very efficient at that point, and a little cumbersome in setting things up. A constant current LED driver doesn't have to be that picky when it comes to choosing a power supply based on the array size. For the most part, if you are using an AC driver, all you need is to make sure that you have the LEDs within the limits of the driver. With what you are proposing, you don't get that kind of flexibility. You also lose any protection that the driver would offer.

Similar Topics

  1. FS: APEX Advanced LED dimming cable
    By Tom@HaslettMI in forum Equipment Sales & Trades
    Replies: 1
    Last Post: 12-19-2013, 03:54 PM
  2. Automation Dimming LEDs with an Apex
    By jimsflies in forum Hardware
    Replies: 31
    Last Post: 02-28-2013, 04:03 PM
  3. Automation Mimicking Nature - Apex LED dimming
    By jimsflies in forum Hardware
    Replies: 9
    Last Post: 09-02-2011, 08:35 PM
  4. Lighting/ LED Adding dimming wires to 60/48
    By Mike in forum Hardware
    Replies: 1
    Last Post: 06-29-2010, 03:20 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

About CaptiveReefs

    If you are interested in learning about reefkeeping or have a problem with your reef, our reefkeeping community is here to help. Feel free to ask a question or search our site. We have lots of experienced reefkeepers that are willing to provide free reefkeeping advice!

    Besides being a great resource for all levels of reef aquarium hobbyists, CaptiveReefs is a social experience that will enhance your enjoyment of reefkeeping. CaptiveReefs is committed to connecting reefkeepers with the support and information they need to grow beautiful coral reef aquariums.

Information

Connect with Us