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Thread: Mag2D LuxIII nFlex mod (8 brightness levels).

  1. #1
    Flashaholic* Icarus's Avatar
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    Default Mag2D LuxIII nFlex mod (8 brightness levels).



    This is my Mag2D LuxIII nFlex mod with 8 brightness levels. Maximum brightness level reconfigured for 1000mA.
    Pewter Mag2D, LuxIII TX1J emitter, blue glow ring, O-Sink, nFlex converter, UCL lens, smooth reflector, using 3xCR123 or 6AA NiMH batteries.





    The bulb shaft has been cut 3mm above the base of the shaft. Then the switch was modded to a momentary pushbutton switch (off-on) and connected via the yellow wires to SWA and SWB of the nFlex. The little spring at the bottom of the switch (+ battery) was isolated from the original switch contacts and connected to the IN+ of the converter using the red wire. The black wire is going straight from the small metal strip that makes contact with the flashlight body (- battery) to the IN- of the converter. Finally two small slots were cut in the remaining part of the bulb shaft at the top of the switch. The converter board was placed upright in the slots and glued in place.

    The nFlex converter is a high efficiency microcontroller based step down converter. A single momentary push button switch is used to turn the flashlight on/off and to select the brightness level. The nFlex is shipped configured for 350mA maximum drive level but can be reconfigured to 500mA, 700mA or 1000mA. There are 7 equally spaced brightness levels in addition to the nightlight level.

    The nFlex is reverse polarity protected by a schottky diode in series with the IN+. Since I donít need polarity protection in this application I soldered a wire across the schottky diode to get some more time in regulation.

    You can read more about the nFlex converter here and here .





    To modify the switch to a momentary push button the switch was disassembled and the teeth at the outside of part A and B were removed. It has to be mentioned that in fact only the teeth of part B have to be removed to change the stock clicky in a momentary push button switch. After removing the teeth both parts were glued together.



    This is my 6AA battery holder. Itís based on the 6AA holder sold by Elektolumens.




    Beamshots from nightlight level to maximum brightness. Distance from the flashlight to the wall was 2m.

    Lux reading at 1m using a Meterman LM631 at different brightness levels (input voltage = 7.2V):
    Smooth reflector (level 1-8): 500 Lux, 1.100 Lux, 2.180 Lux, 3.490 Lux, 4.920 Lux, 6.560 Lux, 8.500 Lux, 10.550 Lux.
    OP reflector (level 1-8): 320 Lux, 710 Lux, 1.390 Lux, 2.230 Lux, 3.140 Lux, 4.190 Lux, 5.410 Lux, 6.700 Lux.

    Brightness at level 8 started dropping when Vin < 6.2V.
    Vin=6.0V =>10.500 Lux; 5.4V => 9.940 Lux; 4.8V => 9.670 Lux.

    The nFlex shuts off at 3.6V

    Thanks to George for this very nice converter!!! [img]/ubbthreads/images/graemlins/thumbsup.gif[/img]

    Thanks for looking.

    [img]/ubbthreads/images/graemlins/wink2.gif[/img]

  2. #2
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    Very nice configuration. looking forward to more pictures and beamshots at various level etc.

    How do you change brightness levels? Is it with every click of the switch? Does it go in a round-and-round fashon or can you go both up and down whenever you choose?

    Thanks.

    Great work.

    Curtis

  3. #3
    *Flashaholic* jtice's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    VERY nice icarus !!!!! [img]/ubbthreads/images/graemlins/buttrock.gif[/img]

    Yours turned out much cleaner than my Uflex 2D mag.

    I like how you used the stock switch, how did you make it just momentary?
    I used an after market switch in mine.

    Mine was basically an experiment to see if it could be done.
    The Uflex was a VERY tight fit.
    About half way through the build, I knew I would have to make another, cuz that one was soooo ugly inside. lol [img]/ubbthreads/images/graemlins/icon15.gif[/img]

    Nice work,

    -John

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    Flashaholic mrsinbad's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    Most excellent!!!

  5. #5
    Flashaholic* gregw's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    Very Nice!! [img]/ubbthreads/images/graemlins/thumbsup.gif[/img]

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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    That's a very nice light.

    I'm interested in your switch mod too.

    If I made one I would probably put a power switch in
    the tail cap to shut off the 0.2mA draw if I wasn't
    going to be using the light for a few weeks or month
    (.2mA from 1Ah = 5000 hours =~ 7 months).

    Did you do your own glow ring? What type of epoxy
    are you using?

    Thanks - Greg

  7. #7
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    Reading the PDF instructions: the min voltage
    for the nFlex is 4.0 volts (lower if you short
    out the protection diode, I believe). What happens
    if you drain the batteries below that? Does the light
    just shut off suddenly? Or does the light continue but
    the microprocessor hangs so you can't change settings?

    Thanks - Greg

  8. #8
    *Flashaholic* jtice's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    i think the Nflex shuts off.
    The Uflex goes into direct drive.

    i think

  9. #9
    Flashaholic* Klaus's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    [img]/ubbthreads/images/graemlins/clap.gif[/img] [img]/ubbthreads/images/graemlins/clap.gif[/img] [img]/ubbthreads/images/graemlins/clap.gif[/img] [img]/ubbthreads/images/graemlins/clap.gif[/img] [img]/ubbthreads/images/graemlins/clap.gif[/img]

    Klaus

  10. #10
    Flashaholic* vacuum3d's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    I did the same exact mod except that your wiring job is much cleaner than my. Nice work. The dimming feature is just plain cool. Next step, add a power cut-off switch.

    ernest

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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    Very Very Nice!!
    Yaesumofo

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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    Vacuum3d,

    Can you tell us (show us) how to make the
    momentary switch mod?

    Thanks - Greg

  13. #13
    Flashaholic* Icarus's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    cue003,
    The user can scroll through the brightness levels by pressing the button for longer than 1/2 sec. The brightness will either increase or decrease one level every 1/3 of a second. The nFlex will toggle from the bright or dim direction each time the button is released.
    If the unit is turned on and the unit starts in nightlight mode, then the direction is initially set to increasing. If the unit is turned on and the unit starts at full brightness, then the direction is initially set to decreasing. If the unit is turned on at any in between level then the direction is initially set to increasing. Each time the brightness level is changed the new level is stored in EEPROM ready to be retrieved next time the unit is turned on.

    greg_in_canada, jtice,
    It's a bit difficult to explain how to mod the switch to make it a momentary push button switch and I don't have pictures of it. [img]/ubbthreads/images/graemlins/frown.gif[/img]
    However I'll start (very) soon doing my next nFlex (LuxV) mod. I'll try to make some pictures and I'll update my initial post. [img]/ubbthreads/images/graemlins/grin.gif[/img]

    greg_in_canada,
    Regarding the glow ring, mix as much glow powder as you can with some 2T clear epoxy. Use slow/medium cure epoxy, five minutes expoy is curing too fast. Green glow powder glows more than blue or whatever other colour.

    Freddy

  14. #14
    Flashaholic* Icarus's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    [ QUOTE ]
    greg_in_canada said:
    Reading the PDF instructions: the min voltage
    for the nFlex is 4.0 volts (lower if you short
    out the protection diode, I believe). What happens
    if you drain the batteries below that? Does the light
    just shut off suddenly? Or does the light continue but
    the microprocessor hangs so you can't change settings?

    Thanks - Greg

    [/ QUOTE ]

    My nFlex shuts off at 3.6V

    Freddy

  15. #15
    Flashaholic* vacuum3d's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    Greg, PM sent. Didn't want to hijack the thread.

    ernest

  16. #16
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    Say you are running at max brightness and the
    nFlex turns off because the voltage dropped below
    4.0V (or 3.6 in your case).

    Is there a way to get it to come back on at a dimmer
    setting or is it crashed?

    Maybe with a tail power switch you could give the
    batteries a rest and then turn it on in night mode.

    Greg

  17. #17
    Flashaholic* Icarus's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    Greg,

    When the input voltage drops below the shut off voltage of the nFlex (3.6V in my case) the nFlex simply shuts off. As soon as the input voltage for what ever reason rises above 3.6V the nFlex will work normal (again). In other words the processor will not crash when the input voltage drops below shut off voltage.
    When battery voltage drops below 4V (or 3.6V in my case) I really donít see any reason to give the batteries a rest hoping after some time battery voltage will rise sufficient to drive the nFlex at a useful level again. Using 6AA NiMH you could consider the batteries being depleted at 0.8V per cell or 6x0.8 = 4.8V.

    Freddy

  18. #18
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    My thinking was that if you ran the light at a bright
    setting until it went into reset it would be nice
    to have a way to get it running again at a dimmer
    setting so you have some light for searching for
    more batteries.

  19. #19
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    [ QUOTE ]
    icarus said:
    greg_in_canada,
    Regarding the glow ring, mix as much glow powder as you can with some 2T clear epoxy. Use slow/medium cure epoxy, five minutes expoy is curing too fast. Green glow powder glows more than blue or whatever other colour.

    Freddy

    [/ QUOTE ]

    Is 2T a brand of epoxy or something else. I've only
    ever used Lepages 5 minute expoxy and it's quite yellow.

    Thanks - Greg

  20. #20

    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    [ QUOTE ]
    icarus said:
    ...
    The user can scroll through the brightness levels by pressing the button for longer than 1/2 sec. The brightness will either increase or decrease one level every 1/3 of a second. The nFlex will toggle from the bright or dim direction each time the button is released...

    [/ QUOTE ]

    Reminds me of the LIONHEART

    Brightnorm

  21. #21
    Flashaholic* georges80's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    [ QUOTE ]
    brightnorm said:
    [ QUOTE ]
    icarus said:
    ...
    The user can scroll through the brightness levels by pressing the button for longer than 1/2 sec. The brightness will either increase or decrease one level every 1/3 of a second. The nFlex will toggle from the bright or dim direction each time the button is released...

    [/ QUOTE ]

    Reminds me of the LIONHEART

    Brightnorm

    [/ QUOTE ]

    Wonder why? [img]/ubbthreads/images/graemlins/naughty.gif[/img]

    george.

  22. #22
    Flashaholic* Icarus's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    [ QUOTE ]
    greg_in_canada said:
    [ QUOTE ]
    icarus said:
    greg_in_canada,
    Regarding the glow ring, mix as much glow powder as you can with some 2T clear epoxy. Use slow/medium cure epoxy, five minutes expoy is curing too fast. Green glow powder glows more than blue or whatever other colour.

    Freddy

    [/ QUOTE ]

    Is 2T a brand of epoxy or something else. I've only
    ever used Lepages 5 minute expoxy and it's quite yellow.

    Thanks - Greg

    [/ QUOTE ]

    Greg,
    It's Devcon cristal clear 2T (two ton) epoxy. This one is very clear and has better heat resistance compared to regular epoxy.
    (BTW it's recommended by Wayne to fill sandwiches). Try this link .

    Freddy

  23. #23
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    Thanks Icarus. I'll check if they carry it around here.

    Greg

  24. #24
    Flashaholic* LEDmodMan's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    Holy crap!!! [img]/ubbthreads/images/graemlins/ohgeez.gif[/img]

    I just finished a mod nearly identical to this! The HUGE coincidence here is that I NEVER SAW THIS THREAD! I swear!!! [img]/ubbthreads/images/graemlins/ooo.gif[/img] I've had this idea since the introduction to the nFlex where I talked about modding the mag switch to momentary operation. I would have had mine done sooner, but I worked night shift all last week.

    I can't believe we routed the wires nearly the same, and we took nearly identical pictures of the exploded switch!
    [img]/ubbthreads/images/graemlins/jpshakehead.gif[/img]

    Nice job icarus! I guess great minds thing alike... [img]/ubbthreads/images/graemlins/yellowlaugh.gif[/img]

  25. #25
    Flashaholic* Icarus's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    New pictures added to show how to modify the stock Mag switch to make it a momentary push button. Enjoy. [img]/ubbthreads/images/graemlins/smile.gif[/img]

  26. #26
    Flashaholic* Icarus's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    Hey LEDmodman,

    No problem about copying my Mag nFlex mod [img]/ubbthreads/images/graemlins/twakfl.gif[/img] as long as you pay the rights! [img]/ubbthreads/images/graemlins/grin.gif[/img] [img]/ubbthreads/images/graemlins/yellowlaugh.gif[/img] [img]/ubbthreads/images/graemlins/crackup.gif[/img]
    BTW I'm working on a Mag LuxV nFlex now, just waiting for my WX1S emitters. [img]/ubbthreads/images/graemlins/wink.gif[/img] Copyrights on this one too! [img]/ubbthreads/images/graemlins/evilgrin07.gif[/img]

    Freddy

  27. #27
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    Very nice and clean, just how I like them.

    [img]/ubbthreads/images/graemlins/thumbsup.gif[/img] [img]/ubbthreads/images/graemlins/clap.gif[/img] [img]/ubbthreads/images/graemlins/wink2.gif[/img]

  28. #28
    Flashaholic* Klaus's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    Freddy,

    what cells will you drive the LuxV from and do you know if the Nflex will fit a C sized Mag ?

    TIA

    Klaus

  29. #29
    Flashaholic* Icarus's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    [ QUOTE ]
    darkzero said:
    Very nice and clean, just how I like them.

    [img]/ubbthreads/images/graemlins/thumbsup.gif[/img] [img]/ubbthreads/images/graemlins/clap.gif[/img] [img]/ubbthreads/images/graemlins/wink2.gif[/img]

    [/ QUOTE ]

    Thanks Will. [img]/ubbthreads/images/graemlins/smile.gif[/img]

  30. #30
    Flashaholic* Icarus's Avatar
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    Default Re: Mag2D LuxIII nFlex mod (8 brightness levels)

    [ QUOTE ]
    Klaus said:
    Freddy,

    what cells will you drive the LuxV from and do you know if the Nflex will fit a C sized Mag ?

    TIA

    Klaus

    [/ QUOTE ]

    3xCR123 to start with but I'm also thinking about 2x(3xCR123) and 8AA [img]/ubbthreads/images/graemlins/grin.gif[/img]
    Unfortunately the nFlex will not fit a MagC. [img]/ubbthreads/images/graemlins/frown.gif[/img]

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