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Thread: dualflex driver

  1. #1
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    dualflex driver

    I developed a 2 channel version of the lflex driver quite a few months ago for the caving community. They required 2 independent channels that could drive 2 different LEDs/Optics (typically a flood and a spot).

    Anyhow, with their input I developed a UI that catered to their needs. It is different than the UI-UNI firmware on all the other flex drivers, but likely a better option for a dual LED headlamp.

    The caving firmware can use either 2 momentary action switches, or a center off momentary toggle or a single momentary action switch.

    Rather than going through all the UI options etc, it's easier to just direct you to the taskled website and you can read the manual there (in the dualflex technical section).

    It has voltage warning, temp monitoring etc.

    The driver is 1" in diameter and has been thermally tested driving both channels at 3A (to 2 XML LEDs) from a single li-ion cell (or 2p, 3p etc cell). Max drive current per channel can be independently set of course (500mA, 1000mA,.... 3000mA, 3500mA).

    Here's a picture, components only on the top side, bottom is for attaching with the supplied adhesive thermal pad material to the heatsink.



    Anyhow, look forward to some feedback from the biking community regarding any UI changes that may make it fit better for your use.

    Oh, there's also several youtube videos I put together showing the difference caving UI's in use (there are 3 'flavours' to choose from via the menu system).

    UIC1 in action:
    Dualflex UIC1 - YouTube

    UIC2 in action:
    Dualflex UIC2 - YouTube

    UIC3 in action:
    Dualflex UIC3 - YouTube


    cheers,
    george.

  2. #2
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    Wow, that's great George.

    Now we need a DIY 2-led housing from Easy2LED and we can forget those Yinding/ Gemini clones.

  3. #3
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    George, is it possible to add a remote temperature sensor and support having a longer distance to the momentary switch? Being able to have the driver on the battery pack instead of the light head would be great.

  4. #4
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    No remote temp sensor, the problem there is more wiring, more solder pads and the need to provide calibration of the sensor/thermistor or whatever it is.

    Longer distance to the momentary switch(es) can be done, but likely needs the same attention that is needed for other flex drivers (0.1uF cap near the driver across the switch contacts) and twisted pair wiring to the switch(es).

    The h6flex (latest generation) now has a schmitt filter IC for longer wiring runs to the switch, but then it has physical room to have had that circuitry added.

    cheers,
    george.

  5. #5
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    I suspect for biking that independent control won't be needed, but the multi-mode would be nice for both lights with a single switch. The main thing that would be superior to the chinese junk lights is that you click to go up, press to go down, with 5 levels.

  6. #6
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    Quote Originally Posted by Ofroad'bent View Post
    Wow, that's great George.

    Now we need a DIY 2-led housing from Easy2LED and we can forget those Yinding/ Gemini clones.
    Or a driver housing kit that we can drive the clones with?
    Would be sweet driving one Yinding with narrow and another with wide optics.

  7. #7
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    I've already got an Idea for a light for this badboy , added this to my shopping list of driver boards (really need to place an order)

  8. #8
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    Quote Originally Posted by znomit View Post
    Or a driver housing kit that we can drive the clones with?
    Would be sweet driving one Yinding with narrow and another with wide optics.
    You'd still have the cool tint, lousy waterproofing and poor heat sinking.

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