Lamina ceramics light chips

[unclearty]

I may be wrong, but I believe the printouts were for the first ones. Apparently, Lamina is growing rapidly..very rapidly..and they're improving the product every couple of months. I really want a white one.

 

[Klaus]

Any news here ?

TIA

Klaus

 

[jtr1962]

Mouser Electronics has them (page 48 of their latest catalog).

 

[Lewie]

I have seen a few of these, they are pretty bright but nothing terribly special, IMHO. And they are hideously expensive, over $100 for one of the 37-die devices, IIRC.

--
Lewie

 

[Wylie]

I had to dig this one up again.
Would anybody have any positive reports on these little jems? I finally got my PDFs straight and I am not as thrilled as I was in the first place now that I am able to look at the PDFs. Anybody have anything on longevity?
108 luminus flux with the seven die looks interesting but keeping it at 77 degrees might be a trick. The efficientcy has me wondering as well although the pattern of the dies in this seven die module has me interested.

 

[PEU]

the 10.5V Vf seems to be a little higher for small flashlights...
But reading previous posts I saw that it worked with 3 cells, I'm a little confused here. /ubbthreads/images/graemlins/thinking.gif

 

[idleprocess]

Interesting... more light than a typical 5W Luxeon, similar price. There's some potential for the 1000 and 2000 models.

I don't see anything in their datasheets about expected lifetime. Hopefully it's better than the LuxV portable.

 

[Wylie]

I'm in the same boat as some of you guys as the configuration of the dies tells the common sense side me that these little gems should be pretty darn efficient although my common sense isn't always to be trusted, you know. The lux output to heat ratio has me a bit concerned as well and then the issue of consolidation of modules has to be taken into consideration as well. /ubbthreads/images/graemlins/icon3.gif
If they can match the L/S 1w in longevity or even get close with the output stated for seven die module I think they would make for some really interesting toys.

 

[lightnix]

10.5Vf, when the rep said they were being overdriven with three cells ? I'm a tad confused too /ubbthreads/images/graemlins/icon3.gif

Never mind the technicalities though, these things /ubbthreads/images/graemlins/buttrock.gif /ubbthreads/images/graemlins/buttrock.gif /ubbthreads/images/graemlins/buttrock.gif

Let's see now... emergency lighting systems might be a good place to start. I've also noticed a near total absence of LED lanterns in the market (CMG and Nuwai apart) - maybe these could provide an answer. Headlamps anybody ?

Can anyone suggest a suitable driver / regultion circuit for them ?

Expect an explosion of light engine mods in the modders forum soon /ubbthreads/images/graemlins/yellowlaugh.gif

 

[The Yeti]

This sounds like a good application for the 1/2 D group buy going on right now.

 

[Hemingray]

I just obtained one red and one amber BL-2000 7-cavity units, these are supposedly rated at <font color="red"> 348 </font> Lumens. 6.69VDC @ 2.8A. Sounds like a good match for 6 NiMH Ds and a .25 ohm resistor (and a huge heatsink). /ubbthreads/images/graemlins/evilgrin07.gif /ubbthreads/images/graemlins/buttrock.gif /ubbthreads/images/graemlins/cool.gif

I figured I'd try to blow these up (hopefully not) before taking the plunge for a 39 cavity unit.

/ed B in NH

 

[PeterW]

yeah, odd. 348lm from the amber but much less from the green, even though green ought to appear brighter. But if they are making them '6 times' brighter soon, then so much the better.

What is the best way to drive them? Some one mentioned the uflex driver, what about a BadBoy or the like?? Boy, these little chaps are going to make excellent room lights (no beam pattern!!) and wonderful flood torches. OF course they are going to need a good amount of power to drive and looks like they will perform even better in the cold!!

PEterW

 

[Hemingray]

Right now I have a red BL2000 running on an adjustable bench power supply, about 6.7V @ 2.8 Amps. Arctic Silver'ed to an old 486 heatsink. Holy cow, is it ever bright!!!!

I suppose 6 NiMH or 5 D Alkies and a .2 ohm 5W resistor would work, I'm not sure if one of the round heatsinks to adapt a Luxeon to a Muglite would be able to draw off the heat in a 5D or 6D light. I suppose a variant of the "pocket zorch" with 6 AAA NiMH and a small metal case is feasable.

For such a small device it certainly throws a LOT of light!

 

[unclearty]

I have been driving a red chip off 3 AA's..direct. The trick, I've found is heatsinking..the more..the better. These things are amazingly bright. The company sent me 2 white chips...unfortunately, the need to see 22 volts!!..an odd voltage. I'm working on a small step up circuit 2 get 24 volts from a 9 volt battery.

 

[Hemingray]

The red and amber BL2000s I have, the four corner solder pads are marked +. R, G, and B, but they connect as shown in the spec sheets, these could be early versions or prototypes.

How are the RGB ones set up, are the three little chips inside each of the 7 dies red, green and blue, or do they separate the three colors into individual dies?

With both the red and the amber, I get about 6.7DC Vf at 2.8 amps. I use old 486 heratsinks, with some airflow they remain reasonably cool, without airflow, they do heat up (I didn't take actual temperature measurements at this early stage).

My initial test was using 8 NiMH AAs, and a hefty 10 ohm 10 watt resistor, I got about 450 mA @ 5VDC, and it seemed pretty darn bright, but nothing even approaching what it emits at full rated power!

Next future step is to try one of Wayne's 1/4 inch thick maglite heatsinks and see if it works in a 6D (6 NiMH and a low R resistor), /ubbthreads/images/graemlins/cool.gif /ubbthreads/images/graemlins/cool.gif

/ed B in NH

 

[NewBie]

see also, lit up:

http://www.molalla.net/~leeper/lamina2.jpg


BTW, think those are bright, try the BL3000, they are insanely bright! Think red and amber were like 1938 lumens or so.

http://www.mouser.com/?Ntt=*lamina*&handler=data.listcategory&terms=lamina&crc=true&N=430&Ne=400

Look at the red or amber ones, labeled BL3000.