Post your MT-G2 driver results here.

Flashlight Modding and DIY Parts
11

Great Idea!

Here are some results from me. All measured at the emitter.

Power supply was used. Voltage reading is analog, so it may not be 100% spot on…
My power supply is rated for “4A max at 5V” and “3A at @12V”. That could be an issue. But it did not seem to have issues (cut-off happens it it have issues).
Both 5A drivers are rated to be 100% 50% 5%

DUP-S5
My driver had SOS in between low and medium. :Sp (not as described)

12V
0,49
SOS= full (high) output
2,44
4,88

9V
0,48
2,45
4,05

7,5V
0,16
1,15
2,78

6V
0,04
0,18
0,44

I could mention that with an XM-L2 on copper, it was spot on 5A, 2,5A 0,5A when I tested it some time back @ 7,5V. At lower/higher driver circuit input voltage it was slightly off, mostly lower, but also slightly higher than 5A was seen too.

FL-2
(mine had strobe and SOS with full output. It was supposed to be a 3-mode, which others have gotten. Readings only show low, medium and high)
12V
0,47
2,43
4,9

9V
0,44
2,52
4,06

7,5V
0,15
0,81
2,39

6,5++V (hard to see, I did not measure. Analog reading only shows 6V and 7,5V. )
0,05
0,30
0,89

6V, did not work properly

Driver circuit from my STL-V6, which was the same as in my TR-3T6.
This driver circuit also have sos and strobe.

12V
0,23
1,10
2,58

9V
0,25
1,16
2,72

7,5V
0,12
0,79
2,04

6V
0,02
0,10
0,29

BOOST/BUCK 3-18V TRIPLE XM-L CIRCUIT BOARD
15V
0,08
0,94
4,00

12V
0,09
0,89
3,74

9V
0,08
0,77
3,27

7,5V
0,06
0,65
2,81

close to 7V (estimate due to analog reading)
0,05
0,59
2,61

6V (did not work properly)

If my power supply did not limit some of these results, then it clearly shows the importance of using 3 batteries if (sustained) high output (3+A) is the goal on an MT-G2. I don’t think my powersupply had issues with the short periods it was used on high with the 5A drivers. My 12V numbers on the IOS 3-18V driver are very similar with MRsDNF measurements with batteries having a resting voltage at 12,2 which would probably be around 11,7 at load. Our numbers match very nicely…

12

Thanks Guys. Keep it up. Fantastic info RaceR86. The measurements from the 3 to 18 volt driver are not that different. Taking into account voltage sag from my batteries I’d suggest they would be very close. Links to your results have been added into the original post.

13

Yupp. The results are basically the same.
Its the “IOS 3 mode 3-18V driver” I used… Maybe you should just call it that since both you and I have tested it but calling it different names (Im thinking about the description in OP.)
I just used the product descrption from the IOS webpage.

I know Relic38 have resistor modded that driver in this thread and used it in combination with MT-G2.

The MF driver is also easy to resistor mod… 0:)

14

Done. The only problem with the MF driver is my lack off love for flashy modes. I’ll add the resistor mod in as well.

15

I shared a build with relic38 using a DRY driver in a Trustfire X8 clone. The reason being the X8 has 19/20mm driver groove, and the clone has a 22/23mm driver groove on the first step and and 19mm groove underneath. Of course the DRY specs are:

PCB diameter: 23MM

for 3*CREE XM-L T6 LED in series.

Input voltage:7.4V~12.8V

4 modes:

Lo——0.1A

Mid—0.5A

Hi-2.25A

Turbo—Direct Drive Max 4~5A; Turbo mode will step down to Hi mode after 120 secs in order to protect driver and emitter from burning.

With mode memory

Using turbo is DD, and the actual output depends on the cells and what they can deliver, ruff estimate 7.4 volts to the emitter, and ruffly 4 to 5 amps. relic said it got 2000 otf lumens, relic can post results here: The DRY works well and is only $5…

Using this host:

http://www.ebay.com/itm/121021214397?ssPageName=STRK:MEWNX:IT&\_trksid=p3984.m1439.l2649

The complete build was:

Host: $19.80

Emitter: IO $21.85

Driver: CNQG $5.00

took only about 15 minutes, basically just an emitter/driver swap…

16

Flomotion’s numbers match mine fairly closely. Using Sanyo UR18650ZT cells, I get right around 5A on turbo and just over 2000lm OTF. It is advisable to leave some resistance in the light, although I’m pretty sure I addressed all areas J) (springs, wires). I used a Noctigon, which is highly recommended.
Not bad for a two-cell light this small.

17

Flomotion, how is the beam with that X8 clone? All flood I am assuming? More throw than an XML P60?

18

The IOS 9A driver does 5 amps from two 18650, and an honest-to-god 9A from three. I was not expecting that. :O

19

So……how bright at 9 amps?

20

The beam is somewhat floody with a very large hotspot. On mine there is a slight ring around the hotspot, but only noticeable when white wall hunting. Outdoors, this is a very nice flood light, that can throw pretty god too. I didn’t measure throw yet though.
Flomotion has a build thread somewhere. I Probably should have answered this question there. :wink:

21

Finally, 9 amps (4000 lm?), I demand that! What 3x18650 (3 x26650) single emitter host fits that driver?

22

Trustfire TR-1200, relevant info starts here: https://budgetlightforum.com/t/-/18955#comment-411218

----------

Tailcap numbers for the IOS 9A driver

2x 18650
low .55A
mid 1.95A
high 4.85A

3x 18650
low 1.06A
mid 3.05A
high 6.57A

Driver makes a pretty wicked squeeeeeee on mid & low with every battery config I've thrown at it (including CR123s).

23

So in simple terms, the emitter is driven to around 100W on 3 cells? :bigsmile: :bigsmile:

24

Its closer to 80 watts at the tailcap……so less than that at the emitter

25

Even if the cells sagged to 4V each at turn-on, that would still be 12V * 9A at the tailcap = 108W before driver losses to the emitter. Either way, this is beginning to sound very interesting!

26

Tailcap is not 9 amps though :bigsmile:

27

Sorry, I saw this and assumed 108W at the tail… now I see the other posts. Thanks!:bigsmile:

28

This build is very dependent on the cells that are used, the better the cells, the better the light runs. Now the host is a cheapie, but does have more mass and size in the pill area than the “real” Trustfire X8. I real X8 pill module is not big enough for the DRY driver, so that option is out. The DRY will take 3 cells (don’t try it, will fry the emitter), and I noticed that people were posting using 3 cells on the IOS driver, so the DRY ought to be similar on three cells in series (definitely a NO, NO). I have not done that(Good Thing). Thanks for having my back relic, on this, he is much better at posting than I, but we did get similar results on the same build. I was really amazed at the build, the idea being, the the MT-G2 is very floody by nature, so I wanted a deep reflector and fairly narrow beam to contain the floodiness, and the idea worked. There is still plenty of spill in this built, but the hotspot is well contained: but quite large. There does seem to be some interesting chromatics in this build, variations of tints of yellow and white, but rather interesting than annoying. Relic can do better on the measurements of throw, but I was impressed at the throw for just 2 cells. The torch is gobbling every electron you give it, so like relic indicates: it is a very small light pumping Boo Coo amps, but seems to handle the thermals, and the MT is demanding everything from the cells, so it does get warm quickly. With the final drive being Turbo or DD, I would guess that counting efficiency and points of resistance, this is about as much light as one could expect from a torch this size at the present without things starting to go into thermal/electric failure…just my view, relic is free to add his view…, remember this is a bottom of the barrel — budget build, for this powerful of a light…at this time…

29

A word of caution. Do NOT use the DRY driver to drive one MT-G2 from three cells in series. The emitter will die a quick death. Quick, as in you will not get a chance to turn it off.
The IO driver is a buck driver, so it will convert the power from a 12V/1.5A level down to 6V/3A level (halves the voltage, doubles the current) in order to keep the current in check.

The other points you make are in line with my findings so far. I’m charging my Sanyo cells right now and will test output again for documenting purposes.
For about $45, this is the lowest cost and simplest MT-G2 mod I’ve seen yet. The ZY-T08 mod was more expensive (could have used a DRY driver there). It was also more work, however if it had actually worked from a 2P configuration, it would have been easy.

30

That is what I thought, thanks for having my back, again, relic…