24v led to work on 12v system

Discussion in 'General Electronics Chat' started by dogdog130, Aug 10, 2015.

  1. dogdog130

    Thread Starter New Member

    Oct 13, 2014
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  2. AnalogKid

    Distinguished Member

    Aug 1, 2013
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    Boost converters that might work start at $1.50 on ebay. Without the required current, impossible to say.

    ak
     
  3. TheButtonThief

    Active Member

    Feb 26, 2011
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    Have you had a look for any DC/DC converters?
     
  4. snav

    Active Member

    Aug 1, 2011
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    Those look like they are using CREE led beads. The most you can use is seven in series for 22v but it's also possible that they are using sets of three in parallel which would allow them to use them for 12/24 by changing a jumper. I recently disassembled this lamp to find these IMG_20150727_115506759.jpg IMG_20150727_115506759.jpg connected in series and running at 22.4v@235ma easy for an smps but for vehicle lighting almost everything I've seen is series strings of 3 lamps. Simpler for a mfg to make one PCB and have a jumper for voltage even if it's internal.
     
  5. ameli

    New Member

    Mar 21, 2016
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    just put 2 of them in series
     
  6. blocco a spirale

    AAC Fanatic!

    Jun 18, 2008
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    Seriously?o_O
     
  7. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Look for a step up buck converter, or modify the leds resistors.
     
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