What two sets of quad footprints? XM XHP70, XM MTG ?
Something like this but then XML and XHP
The original dual quad footprint board was XP and XM. But since the original Q8 comes with a XP board we could go with something else. XM and XHP70 or something else. I think everyone that is interested in a mod ledboard should speak up and name the combination he wants. And then we can count which design is the most prefered. Adding special pads for a thermistor or aditional pads for color leds . . . could also bé discussed. (but to make this happen some of the PCB gurus have to help)
The original quote from Kerui for a quad SRK board was based on a pretty vague pencil drawing, so an exact design is not needed for that (you could use TA’s dedign for the quote and hand in the exact design later) . It helps the interest check if you have the real price.
I think the logic of making it XM and XHP70 can’t be beat. There’s no reason to use XP, since the original board is already that. That board that Texas_Ace made (that The Miller posted above) would work quite well, if changed to XM and XHP70. It’s already set-up for the flexibility to use any combination of series and/or parallel connections. It already has a place for the thermistor. It’s well designed to fit most SRK lights. Since we have access to the exact dimensions of the Q8 board, maybe it could be tweaked to be a better fit there. It needs to be modded a little to accommodate the two hold-down screws.
One major thing though, the wires must be soldered to the MCPCB in the center for the reflector has the milled out area there, so what TOD said, somebody needs to make a design.
The four holes are for the wires
Center hole for screw so sizes probably need a little tweaking too
I have contacted Sundy and asked for a ~ price and min order quantity for a DTP, 2mm copper, 38mm diameter board with a similar layout to the TA board. Now we will have to wait and discuss which design is the most prefered.
I’d be interested in a XM and XHP70 board. Would you need a new driver or can the existing Q8 driver be modded for the XHP leds?
I would order one of these if they were made. I think an XHP50.2 Q8 would be great. It would make the stock 6000 lumens much easier and with much less heat. It should also peak over 15k lumens.
In fact some quick math says that the xhp50.2 could produce ~10k lumens for the same amount of heat as the stock XP-L’s produce 6k lumens due to the higher efficiency (~130lm/W vs ~80lm/w).
XHP70 would be more work since you would have to drill out the reflectors but they should be able to do ~20k lumens, for a few seconds.
Personally I think I would get some 90+ CRI xhp50.2’s and call it a day. 10k+ lumens of nice, high CRI light.
Indeed a new driver must be made, and to avoid having to use 18350 cells,you need to re-work the battery compartment for a 2S2P set-up.
This mod is not for the lazy one! (lazy1=me :innocent: )
The TA drivers already have drivers that will work with 2s and 4s setups. Although a good buck driver would be nicer and the GT design could be adapted fairly easily for the task.
Reworking the battery setup is really not that hard, just a matter of drilling a hole and then screwing a bolt into the driver to allow it to spin. Then minor soldering like any other mod. I was actually surprised just how easy it was to set it up for 2s or 4s. I still wish they came like this from the factory.
Not an easy mod but not that hard either. No special tools are needed past a drill.
Add me for qty 2 to the interest list. The Q8 is a wayy better host than any other SRK's out there.
Boy TA, you got my interest peaked now. I never understood it all quite before. I got a couple SupFire L1's that I'd like to try this with - 5 LED's, 5 XHP50.2's. The L1 is more chunky than a typical SRK. Got to order your boards and some parts...
Yeah, the xhp50.2 would make for a nice soda can light. I figure it could sustain around 6,000 lumens fairly easily and give a pretty darn reasonable runtime at ~10k lumen before it overheats (basically the same amount of time as the stock Q8).
The driver conversion is not that bad either, although for the Q8 either a special board would have to be made for the screws they are using or you would need to glue it down.
Thanks TA, I’m not sure I quite understand this but I’m sure I’ll be able to figure it out when the time comes.
I would take at least one for XHP50 / 70 6V
For XP-Footprint is no need.
This post makes me very interested in one of the boards. I’m getting two Q8 lights with the idea of modding one and this would make it a fun and worthwhile project.
I’ve done more than my fair share of soldering and wiring with guitar effect pedals and other musical instrument-related stuff. I’m hoping that once this is real, there might be a modding thread showing just how it’s supposed to be done using smaller parts and a hell of a lot more power than a 9-volt powered stompbox.
I'd be interested, depending on price. My preferences would be a) guaranteed integration with the stock reflector. (Maybe that's obvious). And b) one of the pad sets should be configured with whatever y'all think are the most future proof option. Is there a latest best from Cree or Nichia?
The 5050 and 7070 footprints make the most sense. The 3535 is taken care of with the stock mcpcb, and other footprints are not really suited to the Q8 as they would be low output.
I’m interested in 1.
I’d like to see the XHP50.2.