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Thread: Cree MKR

  1. #1
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    Cree MKR

    200 lumens per watt..looks like a replacement for the MCE
    Up to 1769 lm @ 15 W, 85C vf 11.7
    Max drive current 1250ma

    Datasheet http://www.cree.com/led-components-a...g/XLampMKR.pdf

    Cree XLamp MK-R LEDs


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    Ooh, those look interesting :-) I've had a couple of DStar customers asking about an upgrade for the MC-E Altair and these look like they may fit the bill.

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    I'm thinking 3 of these in a housing could be a killer light..even if it was a bit floody..5000 lumens

    H6flex set at 3600ma and 3 LEDs in parallel would take care of things..

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    My favorite bar light uses MCEs and Fraen narrow reflectors. This might be an excellent upgrade.

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    Am I reading it right that you need a 4S battery config to run that?

    edit: With the H6flex.
    "Two wrongs don't make a right, but three rights make a left."
    Ty Webb

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    Quote Originally Posted by random walk View Post
    Am I reading it right that you need a 4S battery config to run that?

    edit: With the H6flex.
    Yep.

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    Can someone point me in the right direction to find a 20mm star MCPCB for the MK-R? I've done a bit of looking around but haven't found anything yet.

    It looks like Cutter is currently only offering bare emitters.

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    what are the pad dimensions? Cree tends to use only a limited no. of pad formats (ie. XP/B/T-E/G/D all use the same 3.5mm format), so if you can find out what the pad looks like from Cree's documentation, you might get lucky and find that it uses the XM-L format which would be my guess.

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    I checked out the datasheet for the MK-R, XM-L and MC-E. Nothing looked like a proper match. Cutter is supposed to have stars sometime in March.

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    ah, sorry about that

    any idea if this is 4x XP-E2 dies, like the MC-E was 4x XR-E dies (I think)?

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    I would have thought if they used 4 dies from another led, then it would be closer to 4 xpgs to get the claimed 1769 lumens?

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    Quote Originally Posted by mattthemuppet View Post
    ah, sorry about that

    any idea if this is 4x XP-E2 dies, like the MC-E was 4x XR-E dies (I think)?
    Part is all in series, ie 11V

    Part wont fit existing stars mores the pity
    Cheers
    WeLight

    Cutter Electronics Pty Ltd www.cutter.com.au

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    Quote Originally Posted by ML_ryder View Post
    Can someone point me in the right direction to find a 20mm star MCPCB for the MK-R? I've done a bit of looking around but haven't found anything yet.

    It looks like Cutter is currently only offering bare emitters.
    Sinkpad is coming out with one. New member so I can't post a link, google "Unveiling best thermal management star"

  14. #14
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    Here's the Solder pad pattern taken from the datasheet, hopefully that will help find a PCB if available..
    Cree MKR-creemkr.jpg

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    We now offer the new J bin in 1A on a full copper PCB
    Cutter Electronics
    Cheers
    WeLight

    Cutter Electronics Pty Ltd www.cutter.com.au

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    neat! Great to see direct-to-copper stars becoming more common, that makes a huge difference at high power outputs. I've cross posted this on the MK-R thread on BLF as there was quite a bit of interest on there too.

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    Any idea what optics might work well with these?

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    big ones?

  19. #19
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    Round one's?

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    first pick, carclo 10048, the 26.5 lenses are good, and they are the smallest ones, I have. need to take care of soldering, since the holders are different height, and if tight, with the cable on the pcb, it won't snap in.
    second , a Minnie Reflector, on the small side, all others , get big fast.
    3rd, the Iris, 38mm, gets tall, not as efficient as reflector.
    the copper pcb should be the best there is. not tested yet.
    time to dig out the artic silver, for this puppy.
    for my taste, the new MT-G2 should be fine, and easier .
    have one with 2x mt-g + 2 XML, stupid bright. in low it's brighter then a single lamp,
    on full with 4500 lumen, just pisses everybody off, too much glare.
    and can't see the helmet light anymore. most of the time in low for pleasant cruise.
    medium where needed, and full-blast for the burgers on the grill.
    Last edited by rschultz101; 04-23-2013 at 05:18 PM.

  21. #21
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    pics or it didn't happen Rob, you know the rules There are some nice MT-G2 builds on BLF - either floody lights or gonzo spot lights with giant reflectors. Be interesting to see what you cooked up!

  22. #22
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    it was a test-model, I called it Brick-Light.
    Cree MKR-ziegel-licht01.jpg
    nobody wants one, it's the huge battery you need,...
    all the others are weight-weenies, and penny pinchers.
    no problem , dropping 6k for a bike, but lights, nahh.
    current handlebar light, 2x4xpg2 not as nice, 1/2 the weight.
    might like my rims, 47mm ,540gr ...
    Cree MKR-fr_1371_size880.jpg
    Cree MKR-fr_1374_size880.jpg
    650B is 27.5", these are ~27", it's my getto surly but fully.
    cheers, Rob

  23. #23
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    Why do I think of a twin electrical socket looking at that light?

  24. #24
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    ah, I remember that light, what a monster! Any chance of some beamshots of the MT-G2 and Carclo? I have one of those optics lying around and it makes for an amazing spot with an XM-L, so should be pretty decent with an MT-G2.

  25. #25
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    no beam shots. only used MTG 4k + XML
    recap, really pleasant light . 2x 4k mtg , + 2x5k xml
    in low ~8.5W was sufficient with helmet light
    MT-G2, is around 2.5 deg tighter, and 10% brighter center at same lumen.
    MK-R is the MCE on steroids. strong but fugly. mtg2 junior Arnold.
    king of the hill, snow-white and the seven dwarfs (XML) with a Wolfs pelt.
    translation 7up xml2

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