1. Mini Planning & Registrations | Brisbane Mini, 24-25 June: registration closed

Rainbow Wall Wash - Current issue

Discussion in 'RGB Lights - Intelligent Pixels and 3-Channel RGB' started by cenote, Jul 21, 2010.

  1. cenote

    cenote Suburbs of Philadelphia

    Joined:
    May 16, 2010
    Messages:
    246
    Likes Received:
    0
    Location:
    Pottstown, PA USA
    EDIT: HUGE MISTAKE......ERROR in meter readings. Have deleted and edit the new readings. Was using a cheaper meter, and was not working properly. Got my Fluke back running, and whoops....sorry

    Re-tested Rainbow Flood from Ponddude....first findings

    I assembled so the resistors were not tied into the common bus threw the board, so I could test individual banks of LED's. I used his resistors as instructed. Findings:

    Input voltage (new transformer) :) = 12v DC

    Red's - 38mA w/ his 180 ohm
    Green's - 48mA w/ his 47 ohm
    Blue's - 58mA w/ his 47 ohm

    With modified resistors:

    Reds now have 240ohm = 24.1 mA
    - Much Much better balance on the color, not as bright, but won't burn up as fast :D

    Greens now have 68 ohm = 25.2 mA
    Blues now have 82 ohm = 24.8 mA
     
  2. DanoNJ

    DanoNJ Full Time Elf

    Joined:
    May 12, 2010
    Messages:
    170
    Likes Received:
    0
    Location:
    Monroe Twp., NJ
    Keep at it Chuck, but don't talke a long time. We have things to do, ya know.
     
  3. budude

    budude Way behind schedule - again...

    Joined:
    May 13, 2010
    Messages:
    127
    Likes Received:
    0
    Location:
    San Jose, CA
    Can this be right? The reds would blow up within seconds at 38mA and I don't think the Green or Blue would even turn on at 4mA? I have Greg's Rainbow Flood and they are very bright and I'm guessing they are the same LEDs. I haven't measured the current through them however but might do so now.
     
  4. AussiePhil

    AussiePhil Dedicated Elf Administrator

    Joined:
    Jun 20, 2009
    Messages:
    1,391
    Likes Received:
    0
    Location:
    Canberra, ACT, Australia
    Find Me On:
    Yes very much so, highly unlikely 38mA would blow up the Reds, i have run 20mA leds at 50mA and they continue to work.
    As for the low end, a LED wil start to glow as low as 0.1mA or lower for high efficiency leds, at 4mA they may be close to half visual brightness.

    Cheers
    Phil
     
  5. budude

    budude Way behind schedule - again...

    Joined:
    May 13, 2010
    Messages:
    127
    Likes Received:
    0
    Location:
    San Jose, CA
    Well - - more to the point - Greg was so far off on his design that they run at those levels? dunno - just saying perhaps do a double check of the readings...
     
  6. cenote

    cenote Suburbs of Philadelphia

    Joined:
    May 16, 2010
    Messages:
    246
    Likes Received:
    0
    Location:
    Pottstown, PA USA
    No worries, going to re test tonight after work....I was out of rum :D
     
  7. ron

    ron Apprentice Elf

    Joined:
    Jun 8, 2010
    Messages:
    52
    Likes Received:
    0
    Location:
    Sugar Land, TX
    What's the CL-25 you are referring to? I should probably remember as I've heard it discussed before but I can't pull it out of the old memory bank today.

    Ron
     
  8. cenote

    cenote Suburbs of Philadelphia

    Joined:
    May 16, 2010
    Messages:
    246
    Likes Received:
    0
    Location:
    Pottstown, PA USA
    CL25n3-G's---there .40 from mouser. Fit rate in place of the resistors.
     
  9. cenote

    cenote Suburbs of Philadelphia

    Joined:
    May 16, 2010
    Messages:
    246
    Likes Received:
    0
    Location:
    Pottstown, PA USA
    Have bench test a Rainbow Wall Runner light with fully installed CL-25's constant current IC in place of resistors, and have no problems after burning for 6 hrs straight. Still will able to touch the CC's with out burning or finger :)
     
  10. ron

    ron Apprentice Elf

    Joined:
    Jun 8, 2010
    Messages:
    52
    Likes Received:
    0
    Location:
    Sugar Land, TX
    I don't suppose you could take a picture and share it with us as to what your setup on these looks like?

    Thanks
     
  11. cenote

    cenote Suburbs of Philadelphia

    Joined:
    May 16, 2010
    Messages:
    246
    Likes Received:
    0
    Location:
    Pottstown, PA USA
  12. cenote

    cenote Suburbs of Philadelphia

    Joined:
    May 16, 2010
    Messages:
    246
    Likes Received:
    0
    Location:
    Pottstown, PA USA
    Finally updated my 12v power supply, no longer using the one that only put out a little over 11.5
    re tested mA, and there a little off, will be updating values in a few hrs.

    Edit: Values Updated: Enjoy
     
  13. budude

    budude Way behind schedule - again...

    Joined:
    May 13, 2010
    Messages:
    127
    Likes Received:
    0
    Location:
    San Jose, CA
    I checked my Rainbow Floods and found the Reds to be running at ~33mA. I haven't checked the Blue or Green yet (a bit afraid to at this point...). I posted on Greg's site about that and he indicated that these are 30mA LEDs so even with that they are running a bit hot. I'll check the Blue and Green today. The RFs have 3x6 (18) paths so it would be costly to add CC to these.
     
  14. cenote

    cenote Suburbs of Philadelphia

    Joined:
    May 16, 2010
    Messages:
    246
    Likes Received:
    0
    Location:
    Pottstown, PA USA
    Really a little confused...I rechecked mine last night, and still was getting high 50'sma on the reds with his resistors @ 12v.
     
  15. budude

    budude Way behind schedule - again...

    Joined:
    May 13, 2010
    Messages:
    127
    Likes Received:
    0
    Location:
    San Jose, CA
    You have the Wall Wash though and not the Flood (at least the picture is not the Flood)?
     

Share This Page