TrustFire TR-J12 Driver: Awesome news from Kaidomain

So, I emailed KD about possibly getting a custom programmed version of their 5 LED Series 3-Mode Low Voltage Protection for Two li-ion Battery Circuit Board driver with modes at 100, 75, 50, 30 and 5% with PWM frequency of >1kHz. Last night they emailed me this reply.

So, it looks like we can get them custom programmed for what we want from KD!! I will be ordering one tonight for sure.

I’ve ordered a few V2 nangj with custom modes from kd before…they were always willing to do it…good news on the J12…

That’s incredible news, thanks for sharing.

Can’t tell if serious or sarcastic, darn you internet lol.

My driver made it to their site!!

http://kaidomain.com/product/details.S020417

WOW Nice work… Everyone just MAKE SURE you upgrade your springs with copper braid wire if you do this mod. The stock springs can barely take the OEM ~30W driver. Doubling that current will cook them for sure.

I have a pentaled torch with 3x18650.
Does kaidomain offer a decent driver like the above, with strobeless modes?

Hopefully these pics will leave a lasting impression…
I melted my spring with the stock 30W driver. I was able to re-stretch it and add copper braid wire and all is good. I think this is a MUST-do if you are up-ing the ante to ~55W.

Yea, I need to find where to get copper braid. Actually, any wire should do the trick, I have plenty of 12ga speaker wire that I could add into the spring.

Hi,

Sorry, not really into the scene nowadays, so i need to ask questions. :smiley:

I have a J12, so this new driver is a direct fit needing no mods?

The 5 XM-Ls in the J12 are wired in series? (i thought they were in parallel)

So this one would drive each XM-L in the J12 at about 2.5-2.8 amps? :open_mouth:

And lastly, what would the current draw at the tail with 2S and 3S? I reckon 2S is really going to be really hard on the cells (even 26650s)

Don’t want to get the X100, so this would be great as a 5 XM-L DRY! :smiley:

Hi,

Sorry, not really into the scene nowadays, so i need to ask questions.
No Problem… ask away!!

I have a J12, so this new driver is a direct fit needing no mods?
That still remains to be seen for sure. It definitely looks like a drop in replacement, or near-to that with a little file/dremel work.

The 5 XM-Ls in the J12 are wired in series? (i thought they were in parallel)
They are DEFINITELY series wired.

So this one would drive each XM-L in the J12 at about 2.5-2.8 amps?
Thats what it claims, but again… that remains to be seen.

And lastly, what would the current draw at the tail with 2S and 3S? I reckon 2S is really going to be really hard on the cells (even 26650s)
If its anything like the OEM stock driver in the J12, its a regulated boost circuit. It takes either 8.4-12.6V and boosts it up to about 15-16V for the 5-XML in series. So its lowest current draw will be with fresh 4.2V cells. The stock TR-J12 draws about 29 Watts (3.5A at 8.4V). Stock driver current draw increases (substantially) as the cell voltage drops in order to maintain the ~29 Watt pull. I have measured peak current at ~6.5-7A when my 26650 cells deplete.

Transposing that over to this new driver that pulls ~55W, equates to a 6.5 current draw at 8.4V (55W / 8.4). If its designed like the OEM J12 driver, current pull will increase as cell voltage drops in order to maintain a ~55W pull.

Don’t want to get the X100, so this would be great as a 5 XM-L DRY!
I kind of see it like that too… short burst only at the highest settings.

Yea, the 100% will be a minute or 2 at max, 75% could be for maybe 5-10 minutes, 50% will be closest to the max on the J12 as it is stock so will probably use that most. Also, like I said, PWM frequency is 1 kHz on these 5 mode ones, so should not see much if any PWM flicker on the lower modes, unlike the stock driver :slight_smile:

Hi Kramer, how do you twist this portion off? It’s very tight, and i could not do it even with rubber gloves.

Yeah I used rubber gloves, gripped it and gave it a twist. The rubber gasket makes a TIGHT seal and they dont lube it or anything so its on there TIGHT.

Sorry for my English.
Some thoughts about the driver of the “”Kaidomain”:http://kaidomain.com/product/details.S020417”.
The most important thing is to protect against overheating above 50-55C

I tried to connect a 12V car battery. Currents immediately begin to fall, after 4 min current is 1.2 A (14.4 W to the driver). Dipped into the water head torch, the current up to 2A (24W to the driver).

Wow! thanks for sharing those thermal images lishat, and welcome to BLF! Can you please share information about your thermal imaging setup?

Welcome to BLF

Please tell us for thermal camera setup and about measurement. What I can see you noticed high temps around 62. It is at 100% power from driver or lesser?

WOW thats some impressive analysis… 19C increase at the 6:00 mark.

x2… was that done using the 100% setting? I would expect higher than 50C with a ~55-60 Watt driver.

cant wait to see lumen measurements with the new driver installed.

also that thermal imaging is awesome!

Is 60°C worth worrying about, considering max. operating temp for XM-L’s is 150°C?