What did you mod today?

I have no problem de-doming them now but it was a process figuring it out. I put them in a jar with the Toluene and soak it in almost boiling water. It takes about a half hour or so, any longer and it will kill some of them.

It’s good to know how to do the slice tech too because sometimes it’s a better application. Like on this one, I was worried I’d hit the bond wire with the lens. (I can’t tell you how many times I’ve done that.) Thanks for the tip on the silicone grease I’ll give that a try next time I do them.

Here’s a shot of the sliced SST-40, far left, and a couple of XM-L2’s, the middle one is hot de-domed and the far right is chemical de-domed.

Nice!!

Anyone know how to get inside this, to access the LED / Reflector, etc? It has a XP-G3 in it, and smooth refector. Large end doesn’t appear to be threaded on.

looks like press fit

So, cold slicing for SST-40, thanks guys, I will give it a try, I am not satisfied with my hot liquid dedome results.

DBC, I think you are using too much flux! There is too much gunk on and around the emitter for my taste.
When reflowing I am only using solder paste, after that I clean the led with 96% alcohol, that I do hot chemical dedome process,
when it’s done one more time alcohol bath, then distilled water bath, compressed air to blow off tiny droplets. Thats my workflow.

I don’t use flux at all. Kester solder paste. All of those emitters have been in and out of different lights, especially the middle one, it’s several years old and has seen a lot of abuse. I didn’t see any point in cleaning up anything before they get installed in the next project where they’ll get dirtied up again. For the record, the XM-L2 on the far right was not my doing. It accidentally got left in some serious chemicals for a couple of months prior to being sent to me. :wink:

Ah, that explains a thing or two. :slight_smile:

I use a Q-Tip saturated with denatured alcohol to clean the star before dropping in the reflector. :wink: (and the dome too, by the way)

Edit: That emitter with the darkened substrate on the far right was sent to me as a Luminus SST-40. I took this pic to show that it was indeed an Cree XM-L2 emitter, based on the substrate style, the markings, and the dots on the phosphor all being different. I sliced the SST-40 specifically to show the substrate more clearly, then tried it in my latest build. The output was great, but throw was down significantly and this light is all about throw, so the 40 came back out. It’s been tested in 3 other lights now, and for various reason’s it’s back on the bench.

I did a board with a MOSFET to eliminate the extra resistance from the external switch
size 16-17mm, for 16mm the battery holder fins need to be cut a bit

Ordered 9 boards from Oshpark
Will take some time to get here to Germany and assemble them

Annoyed with the low output with remote pressure switches for flashlight?

I use a MOSFET with a low gate voltage which gets full output down to 1.8V

The MOSFET is powered by a CR1225 Lithium battery with 36mAh should run easily hundreds of hours on

Aliexpress has cheap remote switches, you could dismantle for the cable and pressure switch, or one that fits your flashlight
https://www.aliexpress.com/w/wholesale-remote-pressure-switch.html

With a reverse diode added it could be used as well to charge a button cell over a bleeder resistor on main driver

^ wow, nice job Lexel, if it works as planned I guess you will have quite some customers for it. And the switch will be as good as silent too I presume.

I’m still stuck with the bezel of my X7R… it has been freezed in the freezer, then heated with the hairdryer but nothing seems to free it :frowning:
I was frustrated so instead I put the 3*XHP70 in my X7 :

Thousands lumens of 80CRI 4500K goodness :smiley:

4500K with CRI 80 is a really sweet light source

My R50 got the same flavour with an XHP50 yesterday… Kiriba-ru sure got some nice emitters, at a nice price :smiley:

My first Smini. Emitter had to GO. Went with XM-L2 T6 4C on a 14mm Sinkpad. Was the Black with Cu body… Now it’s CRX inspired.




Very nice VW, very nice indeed! :wink:

That turned out awesome! Guess I need an other s1 now.

Thanks DB and Geuzz.
Just a heads up there is a silver plating under the Black (PVD?) I literayy had to hand file it off the entire light where the Copper is exposed. Sanded with 220 on up to get it to polish as seen. Was a lot of work but looks neat.

Cool :wink:

Very handsome, vwpieces! So the black in the grooves is still PVD-coating, this finish will last very well, should still look nice with a patina. :slight_smile: