Custom SkyRay King SRK Driver

I did a test on an SRK head that has been modified with 3 XML2/T6/3C LEDs on copper sinkpads, 24 ga silicone wire, and an AR lens. At 3.05 amps per LED it puts out 2500 lumens of nice 4600K neutral white light. I used a constant current power supply to drive it (not a driver). Working back from Match’s XML2 testing, the SRK optics (with AR lens) are around 73% efficient.

With the stock SRK driver mod’d with the resistor mod to increase the current (to around 2.75A per led) this head was doing 2200 lumens.

This SRK straight from the factory ($38 via a Tmart sale) only did 1450 lumens… most stock SRK’s do around 1700 lumens of icky cool white light.

LOL :slight_smile: Not that a SRK would be my first choice of a piss light, but i wouldn’t want a light where you can’t directly access both a low mode and a high mode. I have two lights with electronic switches, an Olight S20 and a Zebralight SC60.
Both implement that feature, but i like the zebralight interface more.
With a zebralight, when it is off and you press the button, you have instant light in low mode, and if you release the button before some time threshold, it will increase to high mode. If you hold the button long enough, it will stay low.
With the olight, you have to hold the button down for some time to get to lowest mode, but it will stay dark until that time threshold is reached.

I don’t want to influence the actual interface, because if (and thats a big IF) i actually get such a driver, i’d write my own code anyways. Only thing that i’d like is the driver to be open source :slight_smile:

Nice! That’s right around where I’d expect it too. My SRK with XM-L2 U2 1C on copper SinkPADs pumps out around 2800lm at 2.8A/emitter. Seems right around on course, considering my setup (the integrating box says “keep frozen” on the side :wink: ).

when do i get to buy a board/kit/etc? :slight_smile: :slight_smile: :bigsmile:

Well this is awesome. I was going to build my own driver using the master/slave NANJG 105C setup, but this might be the way to go. I actually started designing a circuit board on some site, but I had no clue what the hell I was doing :)

You have to be pretty damn big to need a SRK for a piss light. And really, if that is the case, you’re probably wanting more throw than flood.

J)

Sky Ray Kung.

It appears that the OP has been updated since I first read it. This sounds like it is shaping up to be a real nice driver board and firmware. I sure hope you will be selling these.

I think that the best option for a Kung driver (for now, at least) is to add an external 8xAMC7135 board for the 4’th LED. The SRK driver board only has room for 24 AMC chips (8 per LED without stacking chips). A Kung specific driver would have 6 per LED without stacking.

OSHPARK has said they have shipped the new layout circuit boards. Should be here in a couple of days.

For the Kung we could stack 8 and parallel the the 3rd and 4th led to the double stack…that should work…or am I wrong?

I need one of these for a de-domed XPG2 SRK... let me know where to send teh munniez. $)

Updated the first post with some testing info on a real board…

Nice. The Kung needs a automatic turn down mode at a certain temperature to make it useable: when I’m using it I constantly have to switch to “low” so as not to continue slow roasting my hand. Maybe efficiency modes could be good: you could designate a max temp range and light automatically lowers when it gets over this range, increases when its below the range? I’m just throwing ideas out there, ignore if they are not doable/reasonable.

That is one great driver for a light I do not own . (but now I finally want a SRK, with this in it)

I can't believe it goes from 0.25 to 2600 lumens.

BTW, with 4 x 2500 mAh cells in the light the 10 uA parasitic drain will drain the batteries in 1 billion hours… over 100,000 years. :party:

any chance this can be scaled down to fit the SRM (Sky Ray Mystery)?

where do i send the monies for the board/etc!!! just read the feature list again and im excessively excited. :slight_smile:

Brian