Question about the LS27 driver

[cryhavok]

...and so the pattern continues: Don builds an excellent and by all means perfect light, to which I poke my head in and say :nana: (see here and here )


I should be receiving a LS27 in the near future and am looking at increasing the girly drive current of the XR-E to something more manly

(Yes, I know, )


From what I read in the FAQ, the XR-E is driven by a "daughter" board that is completely independent of the MMB board that drives the Nichias. The daughter board is a regular GD buck/boost to which I'm well versed in using with various mods. Looking at the pictures, it appears to have 1 .12ohm resistor (hence the ~425mA current to the LED). Given the formula 0.05/Rsense=Iout, I should be able to solder on a .15ohm resistor to the second resistor pad on the board to give me a current of ~750mA to the Cree XR-E. There should be no effect on the Nichia leds. I will use the light only with RCR123s.

So, is there anything wrong with this logic? :naughty:

 

[McGizmo]

It sounds right to me. Take care that you don't introduce any unwanted ground paths when you put things back together. I don't want to come off as encouraging this mod because I don't. There is nothing wrong with what you plan but I don't consider the assembly to be friendly or conducive to being disassembled and then reassembled.

 

[cryhavok]

Thanks for your reply. I have not fully committed to the project, but it will likely be one of those late-night-nothing-to-do endeavors over summer break (which happens to be my last :sick2: ).