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  1. #1
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    hi everyoen! please help me build an led bike light! thank you

    hi everyone i am new to cpd, but i have been reading some threads and this will be my first post.

    -first off a little about me:
    i am very interested in the physics of high powered led flashlights and was wondering if all you pros out there can enlighten me.
    -i have an obsession with flashlights
    -i bought a bunch on DX and KD and now have an armory full of one.
    -somewhere along the road, i got interested in building my own flashlight, but i have zero experience with all of these dealios with drivers and resistors and all that fun stuff in flashlights.

    well down to my point:

    i was wondering if anyone could assist me in doing so.
    to start off, i have around 150-200 dollars to spend and i am interested in building either a triple part bike light (two leds on the sides for wide general lighting, and the middle part an led that will throw far, but still have decent light).

    i was looking at Mr. ACHESALOT's manual in building my own flashlight
    http://www.bikeled.org/

    and came up with the decision of
    |MC-E|CREE XP-E R5? OR R4|MC-3|
    or
    |P7|CREE XP-E R5? OR R4|P7|

    mr. achesalot
    talks about the 3021 buck driver and how it delivers constant 1 amp to the leds. my question is, the P7 has max efficiency at 2.8 amps, so i was wondering if there was a type of driver i could use.

    i also heard the term "direct-drive" on dealextreme threads and was interested how that works with flashlights as well.

    i apologize if i butchered any the LED/flashlight jargon, please forgive me as i am a newbie.
    i certainly appreciate any input


    -thanks:
    chubba

  2. #2
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    Off the top of my head...

    IIRC...the Troutie 7up was on sale in your price range from cutter.au

    Complete kit that will smoke anything I could build.


    Otherwise...get yourself a 20mm triple XP-G and a 20mm triple XP-E r3 boards and optics. (narrow for the r3) Buy a MaxFlex driver from TaskLED. Build a housing. Bore a couple of flat bottom holes for the triple boards. Install MaxFlex. Wire it up. Run wires to a 14.8v power supply. Put on sunglasses or a welding hood...and sunscreen.

    That'd give you a ton of light in a really small package.

  3. #3
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    thanks for the info ill check it out.

    im not really interested in buying a premade light as i already have a million of them on my bike. i just wanted to do a DIY project for myself so i can learn more about what i love so much and it would be cool if i can say,"I MADE THIS!" dont you think?

  4. #4
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    I totally understand. I bought a MagicShine for $95. Since then, I've put countless hours into a housing for another light...and in the end, will cost more money to boot!

    But "I built it!" (and I've already started building another one, hahahaha!

    Here's my triple XP-G light:
    link

    And number two in progress:
    link



    edit:
    You may want to check out the 20mm triple XP-G and XP-E boards that are out. Lux-RC.com is going to be shipping one soon with an integrated driver.

    Cutter's website already offers a single XP-G with a built-in driver and they have several options regarding triple 20's and the 7-up board. The 7-up is quite impressive!

  5. #5
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    that looks aesome! youre quite the craftsman to cut something so nicely and so small.

    what is a triple xpe you are talking about?

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