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White LED Strobes - PCB design and interest thread

Discussion in 'FX Lighting - Strobes, Moving Heads, Etc' started by AussiePhil, Jun 14, 2010.

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  1. OP
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    AussiePhil

    AussiePhil Dedicated Elf Administrator

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    DanoNJ

    As long as the current is limited to 20mA using one or more small leds then yes i believe that they can be powered up all the, needs to be tested yet though.

    As for a twinkle effect, that would involve some some of control, as designed these will just glow when powered up.

    at 12v you would use 3 x 3mm (5mm) leds in series.

    Cheers
    Phil
     
  2. DanoNJ

    DanoNJ Full Time Elf

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    Maybe I missed something..... I thought that these were your standard type strobe lights that blink every few seconds while powered up. Am I wrong?

    Dan
     
  3. DanoNJ

    DanoNJ Full Time Elf

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    Opps! i just re read the first post. Never mind..... :)
     
  4. OP
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    AussiePhil

    AussiePhil Dedicated Elf Administrator

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    From post 1
    "What it is, is a White high power LED that has a constant current source and is pulsed on and off by your sequencing software."

    ------------Which you read as i typed-----------------

    the term strobe i guess is misleading, but the LED versions got nicknamed "strobe" so it has stuck.

    Cheers
    Phil
     
  5. DanoNJ

    DanoNJ Full Time Elf

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    [
    ------------Which you read as i typed-----------------

    the term strobe i guess is misleading, but the LED versions got nicknamed "strobe" so it has stuck.

    Cheers
    Phil
    [/quote]

    Yea. I see strobe for cheap and get all excieted.... :)
     
  6. Tabor

    Tabor Full Time Elf

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    Image these as any other Led connected to a controller.
    The only difference is we have implemented a constant current current circuit on the board.

    It is possible to dim these.

    The choice of controller is up to you, when testing I used a Ren64 and a DCSSR.
    The "Strobe" effect is created by the software.

    The ULN chips on a controller would be fine, check current handling. As stated in the first post up to 300ma.

    As DanoNJ wants a twinkling effect he would most probably want some dimming capabilities.

    The cheaper the controller used is probably better, as the channel count could get quite high.

    We plan on testing all configurations of leds and voltages, video's will be up to give everyone an idea of what they would like.

    Hope this helps, more info will come out once initial boards have arrived.

    Tabor
     
  7. Tabor

    Tabor Full Time Elf

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    Certainly.

    Up to a limit, prob looking at the 3mm led config or under driving the 1/2W leds.

    I think you would be looking at around 80mA per channel.
     
  8. DanoNJ

    DanoNJ Full Time Elf

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    First let me say I know very little about this stuff, however, I was wondering if something like this may work. You could have a channel off your
    controller energize this unit which would then run these LEDs. It has several settings - may be one in there that would be good. It would produce a
    random pattern for several units set in series.
    http://www.pcboard.ca/kits/ledfx/

    Just a thought.
    How off base am I?
     
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    AussiePhil

    AussiePhil Dedicated Elf Administrator

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    Got the constant current chips in the Mouser order yesterday and just had to wire a test circuit up.

    I did stress test the device, running it at 12v and 95mA of current driving a parallel pair of Red leds (2.1v). just about worst case.

    LED Strobe test

    Cheers
    Phil
     
  10. OP
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    AussiePhil

    AussiePhil Dedicated Elf Administrator

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    Second test

    This time with a 3W RGY LED using just the RED LED... current set to 250mA

    LED "strobe" test 2

    Phil
     
  11. riri7707

    riri7707 Full Time Elf

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    Very Interesting and great effect...
    Some schematics to made it on Bread Board for tests too?
    i appreciate...
    Cheers, Henri
     
  12. RandyA

    RandyA New Elf

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    Well I guess I will be in for 100.

    Randy
     
  13. prof

    prof Apprentice Elf Generous Elf

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    I am in for 100

    Prof
     
  14. OP
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    AussiePhil

    AussiePhil Dedicated Elf Administrator

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    Hi all

    A quick add up of the Quantity shows the following
    Total 1842

    cenote 100
    Aproct 160
    Thaiway 100
    ron 100
    KeithTarpley 200
    solidmodeler 132
    kevr 100
    fathead45 200
    smartalec 100
    fasteddy 100
    toodle_pipsky 50
    Vairmoose 100
    XDU 100
    RandyA 100
    prof 100
    RIRI7707 100

    I'll go ahead tonight and get a final price from the board house, we may have a pleasant surprise for everyone depending on freight charges.

    Tabor - i will be ordering extra for you and me :)

    Phil
     
  15. cenote

    cenote Suburbs of Philadelphia

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    Very excited, thanks phil.
    Surprise = free components with order... :) :) :)
     
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