Yeah, the white flats have a neutral thermal pad, IIRC.
Yes, regulated to under 5A, and focus focus focus. The centering piece that Hank has made will help with that.
Ok, yeah, this one has a separate negative contact pad for the leads from the driver so it’s not the pita the Black is. 
Will probably build a PZL driver for it… reversing e-switch 7 modes sounds good to me.
I didn’t get the centering ring but will use his old ones. The FR G10 1/2” thick board my Seanna mounts to is threaded onto the light engine part of the Courui, as such it can be threaded up/down to dial in proper focal length to the Seanna optic. Should work. (with this set up there’s really no need for a centering ring, actually)
If I’m not mistaken, the Seanna optic is capable of focusing a die this size to 1º… should prove interesting. There is a pre-focus TIR in the base with a 6” Fresnel lens up top. Ledil claims a peak candela value of up to 800Kcd, I’m getting 666Kcd from the HI if I remember correctly.
Ledil says it will do 1196 cd/lm from a Black Flat. At 94% efficiency. 1º beam, no estimate on Kcd on the Black Flat. No listing on the White Flat. By contrast, they say the XP-L HI makes 492 cd/lm at 2º.
Dale
How much for Seanna optic and where to get them?
I’m tempting
PZL driver? People still use those? Refresh my memory please. What does the PZL driver have that more recent drivers lack? I don’t remember it being really special when it came out, but then again, I could have ended the sentence with “I don’t remember…” and the effect would be the same. :person_facepalming:
Nico, I think the Seanna is a bit difficult to come by… seems they were over $60 even a few years ago.
David, the PZL is a 2 channel driver built with all 7135 chips, so it’s easy to set the regulation value within the scope of the White Flat. The reason it’s called puzzle is that the text indicating the components sits inside the ATTiny pad, so if you put the ATTiny on first the rest of it is a puzzle.
People still use em? Well, with the resurgence of these Osram emitters the need to keep current controlled brings back even the Qlite’s. Besides, I’m not people…. 
Wight’s PZL board…
Just looked at the thread again for the PZL driver. It just reminded me that not only was wight always coming up with the latest and greatest drivers back then, he always stubbornly insisted on his drivers being aesthetically designed as well. Things had to line up, have symmetrical spacing, etc. Every driver was a work of art!
Yeah, “back then” it seemed like I was the guinea pig, I built everything he and MattAus came up with, including a go at the Knucklehead driver. lol
With my memory, “back then” was yesterday, I still use those drivers all the time, even still have some of the huge 07N02 MOSFET’s…
If I recall correctly, Comfychair started all that. I even learned to flip the big 07N02 upside down on a Qlite in those days…
Yep, comfy set the stage, wight wrote it down in traces. The old HD2010 drivers were the inspiration as I recall - pure spring melting, LED desoldering power!
Indeed, and the HD2010’s reflector would exploit that welding class in a hurry…
I really don’t want to know exactly how much I’ve spent on driver components, boards, li-ion cells and flashlights. I don’t. But I know it’s in excess of (Edit: lets just say it’s excessive). 
Speaking of the hateful HD2010, I once took this outside of the box approach to bring the emitter into the reflector for proper focus. That was the light that started me modding, it didn’t work right out of the box and the extended process to get it working and working well taught me a lot… lol
For you David… I don’t think we ever got the Knucklehead working… not for long anyway…
oh, not trying to call you a knucklehead just reminiscing about the drivers those guys came up with… this one was one of Matt’s I think (MattAus)
Yeah, back then I couldn’t understand anything you guys were talking about with those drivers, so no surprise I don’t retain any knowledge from those times. I “remember” the knucklehead driver, but I don’t know anything about it unless I go back and read about it again.
I kinda got pushed into thinking about these emitters a little while ago, and the idea came to me to use the White Flat’s in a reflectored triple. I like small well made lights, anyone know where I can get a good price on a Brass MecArmy PT16? 
Thank you for the information about the drivers.
I thought: Hm, PLZ that is “Postleitzahl” (= German for postal code), maybe its something else. 
I put something together
testing out the right values for the CC part will need some testing
the 2 blank copper areas are to solder a piece of copper wire likely hammered flat to spread heat better
So, this driver needs a heat spreader? Wow! 
Thanks Lexel! Are you planning to build/sell these? If so, when do you think it will be done testing and ready to buy?
You should sell these to Hank so he can make D1S with White Flat.
Hank is right now not interested in white flat D1S, I tried to offer him driver but he said
it may happen later we will see