LED current measures only 4.5ma

Discussion in 'Lights - Store Bought and Home Made' started by JPB, May 18, 2010.

  1. JPB

    JPB Full Time Elf

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    Thanks for the comments Geoff ( and I know I am actually a bit off topic seeing we should be talking about your LED test rig which actually looks great).

    I know I am in for a lot of work to modify the strings but I have the time and I think the patience. Hopefully the end result will be worth it. I have done this on incandesent strings before.

    In regards to the current that I am measuring, I thought 4.5mA was a bit low. In saying that, if I am measuring 4.5 now, as long as I end up at 4.5 after cutting down the string I should be right shouldn't I?

    regards, Jon

    And from previous post in other thread....

    In the post Christmas sales I picked up a few box of LED icicle strings from Kmart. They are only 2 channel but I am planning to convert them to 4 and as the first step, I put a DMM into the string.
    Each section of the icicle is only pulling 4.5mA which I have found surprisingly low.
    Using a resistance substitution wheel I have worked out the values I will need to maintain the 4.5mA current when I cut each section into two.

    Jon
     
  2. AussiePhil

    AussiePhil Dedicated Elf Administrator

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    Re: Re: My LED string Test Setup

    Guys

    Would you like me to split this off to it's own thread?

    Phil
     
  3. OP
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    JPB

    JPB Full Time Elf

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    Re: Re: My LED string Test Setup

    Thanks Phil, probably a good idea.
    Sorry for hijacking a thread with my second post :-[

    Jon
     
  4. AussiePhil

    AussiePhil Dedicated Elf Administrator

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    Re: Re: My LED string Test Setup

    Jon,

    No dramas, i do it all the time just thought this deserved it's own thread.

    Cheers
    Phil
     
  5. AussiePhil

    AussiePhil Dedicated Elf Administrator

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    Now to your question..

    I'm not overly surprised with a 4.5mA reading, need a couple of other bits of info

    DC voltage used to drive string?
    How many LED's in a section? and what colour?

    Ta
    Phil
     

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