Modding TrustFire 168A-T6

Flashlight Modding and DIY Parts
1

Hi people, I ordered this light and went yesterday and today I tried to mod this dedoming the led, in begin It was well and I could remove the dome. Curiously, the tint of the led turned neutral and I realized some lose of lumens (ok, the loss I just knew but the neutral tint was a gift….).

I tested and really throws well better after dedoming the led, but my obstination of perfectionism forced me to remove the rests of dome near the led (the surface of led was totally discovered) and with this I just slide the blade acidentally and broke one wire……

Ok, just to know, I really need clean up the edges of the led or discovering the surface of the led is sufficient?

Now just to mod, I looking for some parts……

http://www.fasttech.com/products/1612/10001683/1122302-8-amc7135-4-group-25-modes-led-flashlight-driver-c
(in case the stock fries)

http://www.fasttech.com/products/1189701
(I think this a better choice, right?)

I want to use the original driver, can I do resistor mod in this without fries?

Opinions please, and thanks for all for help with another threads :slight_smile:

2

Photo links don’t work for us…so change the links or provide your password and username…

3

That driver and LED both look fine. Next time soak the LED in gasoline overnight and the dome will fall right off perfectly.

4

Werner, I upload in photobucket now :slight_smile:

Jhonny, do you think this led its a better choice for throw and good amount of lumens?

Thanks

5

Franz, for a smaller thrower like this I’d go with an xp-g2 driven at 2.8A. With a 50% medium for regular use at 1.4A and a killer high when you want tovreally reach out.

6

Have you measured the stock current?

As this is no boost driver it’s tuning capabilities are limited to the “direct connection current” minus the circuit resistance current decrease.

But the R220 looks indeed like a current sensing resistor. Is it in the direct connection between the battery and the led(check with DMM on continuity setting)

7

Jhonny, the xp-g2 produce how many lumens in 2.8~3A?

About the spill, I’ll lose or the light the beam pattern continues the same?

8

Werner, I measured three times (in tailcap) in high:

1: 2,3A
2: 1,5A (I dont know why the current fall…)
3: 1,4A (after dedoming the led)

So, this driver is inefficient?

9

Have you measured with the same battery same charged?

10

The first sample was tf flames almost charged, the others was with other tf flames fully charged

11

These measuring results are strange, but I don’t see why this driver is inefficient?
If it is a regulated driver without boost, the current should be constant until the battery voltage falls below the forward voltage… Perhaps it is the maximum you can get with the setup…

Theoretically:
If the resistor is a sensing resistor and you could estimate the stock current than you can calculate which resistor you should add for your favorite current.

Another way is to use a small trim pot(10 ohm) and solder that parallel to the sensing resistor, than you can reduce the resistance and measure the current until you have reached dream current.
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Just in case something could go wrong I would order a cheap replacement driver, such as a nanjg105(this is indeed inefficient), now. If your LED arrives and the driver doesn’t fulfill your needs you don’t have to wait additional weeks to get your driver delivered.

12

Sorry Werner, I dont understand so much your first explanation, my english is not so good :bigsmile:

So, this driver is good for this light?

In the sensor resistor, decrease resistance, increase current? soldering parallelal resistor?

I order yesterday 2 xml u3, 2 xpg2 and one 105c.

Thanks Werner :slight_smile:

13

That’s your decision, I am not sure if the modes are okay. I would try the stock driver.

Yep that is a simple summary of what I said.

Then you have enough to play. If you want still to dedome, try it like Jonny Mac said with a bath in gas. a lot of people think that this is the easiest way.

14

Thankyou Werner, I’ll try when the parts arrives :slight_smile:

Another question, do you think the xpg2 can reaches 700lm± at 3A?

15

Hi guys, I just moded this light, destroyed the original driver with same bad handle on large wire but the 105c worked fine (undriven, but well).

Now I’m trying to mod a x9 with the same driver, I try to short the sensor resistor and the current reaches only 2,4A and only high mode works.

Any sugestions to rise more the current?