That os just 4.2A. Far from the led peak performance.
To bad. Thnx for trying Hank. Keep up the good work.
Hank what about 21700/26650 version of D1s with XPL Hi ?
Or a single led tube light with reflector.
Where is the link? You don’t have that updated on your web site.
Hank, can you offer emitter on pcb with center ring.
this is good for modding
I will get one
Now I’ll have to buy more lights to cope with my emotional distress.
Now I know what Ralphie must’ve felt like in “A Christmas Story” when the neighbor’s dogs ruined their Christmas turkey dinner.
“The heavenly aroma still hung in the house. But it was gone, all gone! No turkey! No turkey sandwiches! No turkey salad! No turkey gravy! Turkey Hash! Turkey a la King! Or gallons of turkey soup! Gone, ALL GONE!”
Too bad it sounded like the perfect thrower. Thanks Hank. I know you will come up with something that I will be interested in.
maybe someone else can come In and still make something like this for us all.
Output for the White Flat seems to be about equal between 4.5A and 5A in the test results from djozz. Above 5A, it starts falling. A 4.2A driver wouldn’t be giving up anything you could see with the naked eye.
I’d love to see a buck driver for the D1S to better support emitters like the White Flat, SST-20, and 219D. I am perhaps less interested than some in hitting the absolute peaks, as I spend more time using my lights with my eyes than with a luxmeter.
Ditto, a Buck driver for all the Emisar models would make them all winners in my book.
No, not far from the peak performance at all actually.
The difference between 4 and 5 Amperes in output numbers is hardly worth overdriving this LED so hard.
You could make it 13 × 7135 though, and get 4.55 Amperes, which is a good compromise.
But i doubt there’s enough room on a single sided driver board for so many 7135’s.
But then again, why not design a dual sided driver board?
This little White Flat has a nice low Vf so it’s suitable for 7135 drivers.
Buck drivers always eat up a little Voltage, they have a minimum voltage drop.
Maybe the same as the old tech 7135 though, which have a minimum voltage drop of 0.15 Volts.
But more expensive and you need more space (hight) for the inductor, especially with high currents.
Looks like it’s time to go back to QLites and stacking chips…
Hank please use this led in the D4S, it should work with the stock driver and get super results
That would be my first d4s then 
13 chips would be the hot setup, or 12 380's. I think somewhere there's an 7+1 or 8+1 OSHPark driver, but probably not to accommodate the Attiny85, or have DEL's tweaks to get the 25/45/85 working more reliably. The most important issue is having the 4.7R before all uses of Batt+ -- this was the biggest issue. Of course the FET gate stuff isn't needed with no FET. Pretty sure I've done 2 channel ramping with a 7+1 or 8+1 style driver, as long as you use the Eagle claw 7135's, least for the single.
If the size is the same as the D4, I’ve made a 1+2+5+moon driver with the 85. If you want to upgrade, you could stack the inner 3 7135 chips and get a total of 11 in a 2+4+8 config to get up to 3.8A