BLF GT (preliminary) modding thread

So the LD-3 can put down the votage from 4s to 1s led or not?

For a 1s set up cell holder I would need the help from someone to desing te board for oshpark.

No it can’t. It would burn up.

I want to see a XHP-70.2 on it! It should still throw like crazy at least farther than my eyes can see anyway with lots of lumens to spare :sunglasses:

As Giorgoskok pointed out, a MTN buck driver is a good solution for a 3v led and no need to modify the cell holders. This one: 17mm MTN-MAXlp HP 1A-5.5A Low-Profile Buck Driver - 5V-18V
But remember that this driver must have a thermal path to the flashlight body.

With an xp-g* why not just use one cell per holder and use a bit of wire as a jumper, that way you can easily revert back to standard, same with two cells for 6v leds, and use three cells for those hard driven 6v leds :smiling_imp:

Cheers David

Nice idea David. That would be more on the budget side. :+1:

For an XP-G2 it would be highly preferable to use 2S battery set up with a buck driver, because the Vf of an XP-G2 is around 4 Volts or more when you drive it hard.

^ What he said :smiley:

Cheers David

Ah dummy pass through carrier fillers, smart!

Does anybody knows what kind of max amps we can expect from the original driver (modded or not) on a xhp70(.2) ?

I’m pretty sure the xhp35 on mine wont stay long, i’ll transform the GT into my dream K60 on steroids.

Standard the driver puts out 2A on high and 2.5 on turbo, that should stay the same for all 12v leds.

I did read somewhere in the group-buy thread that it can be modded to 5A with cooling.

If I am wrong will someone please correct me

Cheers David

IIRC, 5A is indeed its limit. It definitely needs a good thermal connection to the flashlight body. Might even need more heat sinking at that power level.

What about a hardcore mod? (spacer needed).

- seven reflectors: http://kaidomain.com/p/S026180.42mm-x-57mm-SMO-Aluminum-Reflector

- 3P xhp-70.2 (12v configuration each) wired in paralel with 4s dedomed xp-g2.

  • FET driver.

Only question, is there a 4s battery capable FET driver with electronic swhitch configuration for this mod?

A dded XHP35 is a must have for a modded GT, if XHP35 based ofc:at least 15, ( even 20% possible) bump in candelas

The Miller : shall we have a spare drivers for that light? Or at least an Oshpark PCB option

Like that idea,Or how about 7 XHP-35? 14,000 to 17,500+ throwy lumens? :nerd_face:

Ready and waiting……

De-Domed XHP35’s E2’s E4’s, XPL W2’s, Old School 6.3amp XP-G2 and even a DD 70.2 just for kicks!

3amp 4S Linear Drivers are ready too, so contact boards will be needed or just wipe the stock one clean!

How about spare reflectors for purchase also!

You probably don’t want that deep reflector.
Deep reflectors are not what you hope for.
You get a very wide and bright corona and not much throw.

NarsilM with TA LDO drivers just running the FET should work well
just need to figure out the resistor value for 4S to get proper LVP

Jerommel: correct me if I am wrong, but as far as I know throw depends on reflectors diameter. A taller reflector makes the hotspot to be smaller (this is the reason for choosing them).

Lexel: But this driver needs to be build and programed. Don’t have the skills for the firmware stuff.

Think the driver board can be ordered at oshpark already.
If not, it will be so and a list of components will be posted in the GT thread at a later time