5W LS in mag AA possible ?

[snake]

when I got my R2 MM in hand, I keep thinking: "is that the end of mag AA evolution?"
suddenly, I come up with 3V AA..CR3VP or CR6VP!
with this battery I can power a 2AA mag as other 2 CR123 flashlight...
so may be a BB700 moudle with a 5W LS.. everything seems ok !? will the size or heat cause any problem?
thank you for everyone's input!

 

[LED_ASAP]

Size will be OK, heat may be the real problem /ubbthreads/images/graemlins/frown.gif

 

[tvodrd]

snake,

Wayne's drop-in modules consist of the circuit board and the emitter board stacked into a "sandwich," with the space between filled with epoxy for crush resistance and *some* heatsinking for the electronics. The heatsink path from the Luxeon's slug is to the copper clading on the emitter board to the very thin "lip" at the front of the minimag's battery tube. Wayne has indicated that this is insufficient heatsinking for a 5W driven to spec, and I concur. I think it has been done, but with very mixed results.

Larry

 

[BentHeadTX]

It might be done this way,
Besides the 3V lithium AA batteries, I would put a BB500 in a Stoplight or Brinkmann 2AA. Throw in the lowest Vf 5W you can find and then things get interesting. Thermal epoxy the sandwich into the Brinkmann or Stoplight head and solder the top of the sandwich to the barrel of the light (for a good ground)
Say you would get a Vf of 6.2 volts, underdriven to 500mA would be around 6V on the Luxeon. With the improved heat conduction of the thermal epoxied head and underdriven LS, it should work fine. We are only talking about 3 watts and the MadMax+ Q3L does that now. Now to find an X3T and life would be good!

 

[snake]

thanks for everyones quick reply!! /ubbthreads/images/graemlins/bowdown.gif
again heat is the real problem..

/ubbthreads/images/graemlins/mad.gif ok let me buy a CR3VP and a scorpion bulb tonight and see how the poor mag melt down.... I will add a mcflood and a glass lens.. /ubbthreads/images/graemlins/tongue.gif

 

[CNC Dan]

Keep an eye out for the 'CNC-123', it has cooling fins.

 

[Rothrandir]

the main problem with the sandwhiches is not the light mass or surface area, it's the heatsink/lip contact point.
a lot of the heat won't even get outside the lip of the dropin! /ubbthreads/images/graemlins/frown.gif
unfortunately...there's no real way around this /ubbthreads/images/graemlins/frown.gif

 

[CNC Dan]

So what we need is a new head that has a 'landing pad' for the LS emitter and two small holes for the output wires of the converter to pass through. Bond the emitter to the head, thread the wires through, trim wires to length, solder to emmiter leads. Sound good?

 

[McGizmo]

Sounds familiar! /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/tongue.gif

 

[INRETECH]

Opeating life will be VERY short

"Hey mister, why is there a cable coming out the flashlight and going up your arm ?"

Heatsinking is the BIG problem, I don't think you can et a good thermal path from the LED to the flashlight

"Tim - some things were just not made to be"

 

[tvodrd]

[ QUOTE ]
CNC Dan said:
So what we need is a new head that has a 'landing pad' for the LS emitter and two small holes for the output wires of the converter to pass through. Bond the emitter to the head, thread the wires through, trim wires to length, solder to emmiter leads. Sound good?

[/ QUOTE ]

/ubbthreads/images/graemlins/grin.gif More than a few of us been-there-done-that. /ubbthreads/images/graemlins/grin.gif Actually, its kind of an interesting example of form-following- function. I had never seen a McLux prior to doing the "Small 123LS" and CR2 lights. My CR2 lights and the Firefly use an *improved* (wrt heatsinking) version of dat2zip's modules in a miniMag. It has proven effective so far! I still recommend against a minimag as an appropriate host for a 5W. Even the SF L4 pushes the envelope.

Larry

 

[CNC Dan]

[ QUOTE ]
tvodrd said:
[ QUOTE ]
CNC Dan said:
So what we need is a new head that has a 'landing pad' for the LS emitter and two small holes for the output wires of the converter to pass through. Bond the emitter to the head, thread the wires through, trim wires to length, solder to emmiter leads. Sound good?

[/ QUOTE ]

/ubbthreads/images/graemlins/grin.gif More than a few of us been-there-done-that. ..... I still recommend against a minimag as an appropriate host for a 5W. Even the SF L4 pushes the envelope.

Larry

[/ QUOTE ]

I'm thinking of making the whole light, head and all. Mag' can go jump in a lake.

 

[tvodrd]

Dan,

/ubbthreads/images/graemlins/thumbsup.gif /ubbthreads/images/graemlins/thumbsup.gif

Larry

 

[Xrunner]

[ QUOTE ]
CNC Dan said:
I'm thinking of making the whole light, head and all. Mag' can go jump in a lake.

[/ QUOTE ]

... and sink straight to the bottom because of how heavy their lights are. /ubbthreads/images/graemlins/grin.gif

-Mike

 

[snake]

Re: 3W LS in mag AA possible ?

how about 3W ?? is that possible ?

 

[shankus]

Re: 3W LS in mag AA possible ?

I was wondering the same, but I don't see a reason why not.

 

[CM]

Re: 3W LS in mag AA possible ?

No reason other than heat. I personally wouldn't drive anything in a mag host at anything beyond 500mA. If you thermally epoxy the sandwich to the body (must also make sure you make the cathode connection) and use a Kroll or similar, that would improve the heat transfer if you must have a higher drive level.

 

[shankus]

Re: 3W LS in mag AA possible ?

I have no problems with my MadMax+ R2H. It is driven over 800 mA. It gets warm, but not hot.

The spec on the 3 watt luxeon is 700 - 1000 mA, isn't it?

If it doesn't create more heat for the same current as the 1 watt, it wouldn't be a problem. And, it should put out more light for the same current, right?

 

[shiftd]

Re: 3W LS in mag AA possible ?

Shanky, the MM+ does indeed deliver that much current, but that is only for a short time and it is not constantly 800 mA. However, the 700 mA (or 1000 mA) delivering to the 3W is maintained over the whole run time (assuming you are using BB). If, however, you are using MM to drive the 3W, you will probably be disappointed by your 3W because it is not driven with full power (well, it is driven with 800 mA only for the first 5 min or so).

At least that is what i think regarding the heat issue. If i made mistakes, please correct me /ubbthreads/images/graemlins/smile.gif

 

[McGizmo]

Re: 3W LS in mag AA possible ?

I think for many intents and purposes, we can consider a Luxeon III as a 1W that is *designed* to be driven at 700 and even 1000 mA if thermal considerations are addressed. The power requirements are essentially the same as those of a 1W.

I wonder if the efacacy (sp) of a III is higher at say 500 mA than a 1W driven at 500 mA.

- Don