NEXTORCH - 300 m long-shot E6        
Page 1 of 2 12 LastLast
Results 1 to 30 of 34

Thread: I Want to stuff a 5 W Lux into a 4 D cell Mag

  1. #1

    Default I Want to stuff a 5 W Lux into a 4 D cell Mag

    Sorry if someone posted this before, I'm new.

    anyways, I wanna put a 5 W Lux batwing inside a 4 D cell M@glite. What do i need to keep from smoking a very $$$ emitter?

    my plan. build a copper disc to sandwich in the head unit of the Mag for heatsinking and mounting. run the emitter directly off the batteries.

    now the problem. I know i cant do this cuz it'll prolly burn out the emitter. ( 4 X 2200 mAh 1.2V D cell Ni-Mh) batteries.

    What i want is a LONG (battery wise)lasting, Stupidly bright flashlight

    any help is appreciated in terms of resistors, electronics know how.

    or just tell me I'm stupid and give up.

  2. #2

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    Naw, you're not stupid.
    We all want bright long lasting lights.

    You have alot of options.
    First you don't have to make the heatsink, unless you want to.
    A Hotlips or Osink can be bought from their makers on this site.

    Power can be handled several ways.
    Quickest & lowest cost is to sleeve the 4 D body with a 1" dia. PVC pipe & use 5 c cells.
    This won't get everything the LED is capable of but is bright & won't fry it.

    A power control circuit will allow a brighter output without blowing the smoke out of that expensive LUX V.

    NIHM's can be had with much more capacity than 2200mah's for longer run time.

    I'm short for time so somebody else will have to direct you to the parts.

    Theepdinker

  3. #3

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    i just recieved my "drop in bulb for the 4D mag from CFR lights. running off 4 - 1.2 Ni-Mh isnt really spectacular.
    I also got one for my 2AA mini-mag. again less than spectacular.

    upon switching the Ni-Mh out for 2 regular AA's the minimag's output considerably increased. 1.5 (3V) VS 1.2 V. (2.4V)

    Now I gotta run out and get some D cells.

    anyways the drop ins are poo for power, but I'll guess they will be great for reg use and long batt life.

    the final insult. I had to pay customs and duty on the bulbs, tacking on an extra $30 to the cost. I'm P!$$3d off.

  4. #4

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    back to the topic. obviously i dont want to sell the 4 cell Mag for a 3, which would probably satisfy the power needs of the 5W lux without smoking it or needing any circutry.
    so i built a "dummy" battery from copper pipe and insulated the sides.

    voila! a 3 cell mag.

    will this allow me to direct drive the 5W lux safely or is a 1W/3W more of a reality?

    Cheap is what i crave.

  5. #5
    Flashaholic* StoneDog's Avatar
    Join Date
    Oct 2002
    Location
    Suwanee, GA
    Posts
    1,591

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    Hello and Welcome!

    Your LuxV should be safe. Depending on the bin of the LuxV it will have a forward voltage well over 6.5v. At 4 x D NiMH you'll be pushing 4.8v into it which will probably under-drive the emitter quite a bit. You might consider using a boost converter like TheepDinker mentioned. The FatMan is a good choice as is the BadBoy.

    Again, Theepdinker already mentioned this, but there are a few people selling pre-made heatsinks designed exactly for this sort of thing. The OSink and HotLips are both perfect for the job. The second link above (The Sandwich Shoppe) offers hotlips and OSinks can be found in the Custom B/S/T forum here on CPF. These heatsinks have more mass than a sheet of Copper, are very easy to use (no fabricating) AND they help center the emitter perfectly.

    Finally, what's up with those whimpy D cells at only 2200mah? There are AA batteries out with 2500mah capacity! This place has 11,000mah D cells. [img]/ubbthreads/images/graemlins/smile.gif[/img]

    Good luck with the mod, it should make for a very nice light!

    Jon

  6. #6

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    can a 5 W lux be direct driven?

  7. #7
    Flashaholic* Nitroz's Avatar
    Join Date
    Jul 2004
    Location
    Monroe
    Posts
    3,196

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    For the heat sink look here.
    Yaesumofo
    And for the Lux V here.
    Phtonfanatic

  8. #8
    Flashaholic* Nitroz's Avatar
    Join Date
    Jul 2004
    Location
    Monroe
    Posts
    3,196

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    Yes. On 5c cells.

  9. #9

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    [ QUOTE ]
    Nitroz said:
    For the heat sink look here.
    Yaesumofo
    And for the Lux V here.
    Phtonfanatic

    [/ QUOTE ]

    both links are the same?

  10. #10
    Flashaholic*
    Join Date
    Jul 2003
    Location
    Louisiana
    Posts
    3,635

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    I just built me a 4D 5W light. I used an o-sink and a badboy750 converter potted in an ecan. It runs on any D cells that I throw at it and will run at full brightness for about 4 to 5 hours. That's what I've been told anyway. I'm not big on math.

    Even at the relatively mild current level of 750mA, it puts out monster tons of light for an LED and runs for a long time.

    If you want to forego the converter and go for direct drive, you'll need to know the forward voltage of the emitter you are going to use and tailor the battery configuration to the luxeon. In the end, the converter is a good way to go. There's just less guess work involved.

    Don't get me wrong. I love direct drive setups, but for constant brightness and less worry about which batteries you have to use, a converter is the best way to go.

    There are a couple of different converters that you could use. Georges80 (I believe) has a killer circuit that would do the job. I used a BadBoy because that is just what I stock and use for 5W luxeons. For me, they are predictable and run very well.

  11. #11

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    okay, i have a 1 Watt Lux sitting in front of me. I have made my own mount this AM from aluminum sheet 1/8" thick. power is provided via the broken bulb method. click the switch and i can have 6V or using my dummy battery, 4.5V.

    can I direct drive the 1W lux? i need 600-700 mA and at least 3 hours of light. Can I do this with a resistor? Do I even need one?

    I know its not the best way, but I'd Like to try it out before plunking $ on coverters and what not.

  12. #12
    Flashaholic*
    Join Date
    Jul 2003
    Location
    Louisiana
    Posts
    3,635

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    You really don't want to drive a 1W with 6v and using resistors to tame it is too much of a waste. Depending upon the Vf of the luxeon, 4.5v will work better.

  13. #13

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    so 4.5V (3 D cells)direct drive and no resistor?

  14. #14
    Flashaholic*
    Join Date
    Jul 2003
    Location
    Louisiana
    Posts
    3,635

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    You can DD a 1W on 3D cells.

    If you are going to run it on alkaline cells then a K Vf should work fine. If you are going to run it on nimh cells, then you should go with an L Vf. With either of these setups, you shouldn't need a resistor, provided that you use proper heat sinking.

  15. #15

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    okay the 1 W lux worked, I just ordered a 5 W and will swap it in when it arrives. many thanks for all your help guys.

  16. #16

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    Turbo,
    Just to make sure things didn't get confused.
    1 Watt & 3 watt Luxs can be run direct with 3 cells.

    5 Watt requires higher voltage to run properly.
    5 cells will be needed to get close to the correct current.
    6 cell will be to much for direct drive.

    More or less cells will require a resistor or a boost or buck circuit to regulate for proper current.
    Add the previous info relating to Vf and you have a pretty good guide line to follow.


    Theepdinker

  17. #17

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    question. can i run a 1W Lux off of 4 D cells (ni-Mh), rated at 1.2V (4.8V)and 2200 mA?

    seeing as 3 X 1.5 D's (4.5V) is pretty close in voltage.

    whats a K vf and a L VF ???

    sorry i'm still learning.

  18. #18

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    Here's a link to idleprocess' Lux info.
    It explains most of the bins & codes.
    http://idleprocess.net/pdf/luxbins.pdf

    Vf (voltage forward) is the voltage specified by the mfg.

    nimhs lower internal resistance allow a higher current delivery rate. Proper operation would likely require at least a resistor.


    Theepdinker

  19. #19

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    ah..many thanks

  20. #20
    Flashaholic* 3rd_shift's Avatar
    Join Date
    Mar 2004
    Location
    DFW. TX. U.S.A. Earth
    Posts
    3,337

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    I have a 5d direct driving a 5 watt Luxeon with no problems off of 5 D cell Supreme Power9000 Nimh batteries.
    Runtime is 10+ hours at a good 120+ lumen brightness. [img]/ubbthreads/images/graemlins/buttrock.gif[/img]
    Just go up to 5 D cells, and everything gets easier for driving a Luxeon5.
    This was my 1st Magmod by the way.
    I still love the dang thing.

  21. #21

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    i may have to do with 5 C's as my mag cant accomodate 5 D's
    thanks fot the input tho.

    mebbe i should go buy a 5 D mag....naw...way too long as is.

  22. #22

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    the bin code of my 5W lux is VXITW wont 5 C's bee too much?

    the (T) Vf code says 6.39-6.87 V

    wont 5 C's = 7.5V? = dead emitter?

  23. #23
    Flashaholic* KDOG3's Avatar
    Join Date
    Aug 2004
    Location
    Sea Isle City, NJ
    Posts
    4,240

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    Larger version of your avatar, please [img]/ubbthreads/images/graemlins/wink.gif[/img]

  24. #24
    Flashaholic*
    Join Date
    Jul 2003
    Location
    Louisiana
    Posts
    3,635

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    If you have a 4D light, why don't you just run a converter. One of George's or a BadBoy. That way you won't have to mess with battery conversions or anything. I have a VYOT that I'm running on 4D cells with a BadBoy750 converter. It's a nice light, when you need lots of light.

  25. #25
    Flashaholic* Nitroz's Avatar
    Join Date
    Jul 2004
    Location
    Monroe
    Posts
    3,196

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    [ QUOTE ]
    Turbo_E said:
    the bin code of my 5W lux is VXITW wont 5 C's bee too much?

    the (T) Vf code says 6.39-6.87 V

    wont 5 C's = 7.5V? = dead emitter?

    [/ QUOTE ]

    No dead emitter. I used a Uxxx from photonfanatic. First I tried 4 D cell and the output was just no enough, until I stuck in the 5 C's.

    A regulator would be nice to dial it in just where you want it but that just add $20 to the cost of your project.

    Here is a quick and dirty review of my Lux III vs. my Lux V mags.
    Review

  26. #26
    Flashaholic*
    Join Date
    Jul 2003
    Location
    Louisiana
    Posts
    3,635

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    Using a converter does have its adavantages.

    It allows for a constant output and also allows you to tailor the output and luxeon to the light rather than having to tailor the light to the luxeon/output, by way of battery configuration.

    Besides, with a T Vf luxeon, it won't be long before the luxeon is actually being underdriven. The T Vf is too high for 7.5v and too low for DD on 9V.

    From an output standpoint, using the luxeon that you are proposing, I think you'd be better going with a converter than direct drive.

  27. #27

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    after spending $30 on a 5W lux, i'm kinda wary (read: cheap)of spending another $20 on a converter. Maybe I'll use the other LUX III i have here instead till i can scrounge up another $20.
    thanks again guys, as alyways your input is always helpful.

  28. #28

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    so i put the 5W Lux in and ran it DD off of 5 C cells...WOW! that sucker is bright!

    I've ordered the "Fatman" booster circut board. cant wait till it arrives. i'd much rather use D cells

  29. #29
    Flashaholic* Nitroz's Avatar
    Join Date
    Jul 2004
    Location
    Monroe
    Posts
    3,196

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    Not only that, but you will know what you're putting to the emitter.

  30. #30

    Default Re: I Want to stuff a 5 W Lux into a 4 D cell Mag

    DONE!






Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •