Custom SkyRay King SRK Driver

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likeaboss
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Wow that’s a amazing driver! Can’t wait to see it in action.

Candlepower (abbreviated as CP) is a now-obsolete unit which was used to express levels of light intensity.

Candlepowerforums (abbreviated as CPF) a website, also obsolete, drive

Serifus
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Ive spent a long time thinking about a good UI
Normal:Off(quick press)>high>mid>low>Off
Ramping:Off(long press 2secconds)>ramping from moonlight to high, then have a quick press from anywhere in ramping to take it to normal and at any point in normal modes(long press) to get to the blinky ones. that way if something goes bump in the night you can still blast out a pile of light, or if you are ninjaing out of bed to take a piss you can hold it and get moonlight and not wake anyone up

texaspyro
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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.

SeanHatfield
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Serifus wrote:
Ive spent a long time thinking about a good UI
Normal:Off(quick press)>high>mid>low>Off
Ramping:Off(long press 2secconds)>ramping from moonlight to high, then have a quick press from anywhere in ramping to take it to normal and at any point in normal modes(long press) to get to the blinky ones. that way if something goes bump in the night you can still blast out a pile of light, or if you are ninjaing out of bed to take a piss you can hold it and get moonlight and not wake anyone up

LOL 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 Smile

relic38
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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 ).

Welcome the night.

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

JonnyC
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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 Smile

ImA4Wheelr
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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.

Sirius9
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ImA4Wheelr wrote:
…SRK for a piss light.

ImA4Wheelr wrote:
…more throw than flood.
J)

 

leaftye
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Sky Ray Kung. Innocent

The low mode should be lower.

ImA4Wheelr
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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.

texaspyro
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leaftye wrote:
Sky Ray Kung.

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.

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

Werner
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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?

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

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

B42
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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.

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

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

The low mode should be lower.

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

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

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

Brian

oRAirwolf
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Why dont we start a Kickstarter or Indiegogo to crowd source enough funding to get these boards made?

I would happily contribute a nice chunk of change to see these things be made available.

texaspyro
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I’ve done some testing on the thermal throttling code. Originally I had let it adjust the PWM up or down based upon the temperature, but this caused some problems. The temperature reading would bounce up and down a degree and the shifting PWM level would causing the light to flicker. I now only let the throttling go downward.

At the full 9 amps the case temperature reaches the 44C step down threshold after 1.5 minutes (the driver is about 9 degrees C above the case temperature). After around 10-12 minutes the light has stepped down about 50% and the temperature no longer rises. If the case reaches 60C the light shuts off completely.

Also, after doing some of the thermal torture tests, the Vf of the LEDs has shifted enough that they will no longer light up at that 0.25 lumen firefly level. It looks like the dimmest it will reliably do is around 6 lumens.

PilotPTK
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texaspyro wrote:
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:

Math Fail.

4 * 2.5Ah = 10Ah

10Ah / 0.00001A = 1,000,000 Hours

1,000,000 / 24 = 41,666.66 Days

41,666.66 / 365 = 114 Years

Either way, Probably long enough Smile

 

PPtk

I am currently extremely busy with work. Please do not expect a response from me quickly. I will be dropping in as time permits, but the amount of time I can dedicate to responding to topics and PMs is very limited.

relic38
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Um, yeah. the cells will deplete themselves in under 10 or so years. Big Smile

Welcome the night.

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texaspyro
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PilotPTK wrote:
Math Fail.

Ooops… :8) divided 10,000 mAh by 10e-6 amps… should have been 10 Ah/10e-6 amps. Oh well, back to the drawing board. Anyway, it does beat the SRK parasitic drain of 5 ma by a factor of a zillion.

JohnnyMac
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TP, I am so freaking impressed with what you've done here! Just amazing.  Crown

Can't waiit for them to be available. Put me down for two.  Cash

troisanh
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Nice work put me down for 2 also when available.

oRAirwolf
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Kickstarter this!!!

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