Mod - Crelant 7G10 (Pic Heavy)

Thanks Ouchy. I'm no focus expert. So I could be wrong. I should also say that I have dedomed very single MT-G2 that I've put in a light. I think that makes focus more critical because it significantly reduces the apparent emission surface.

Those bases sound real good. Over an inch in diameter. Also looks like the copper is flush with the top of the MCPCB. Both are the main reasons I go through the trouble of rolling my own. Definitely worth the price. I will be ordering at least a couple of those too. Thanks for reporting them.

I have only used the HX-1175b with hardy MT-G2's. RMM has sacrificed scores of xml's in an attempt to tame the driver for broader applications. For that reason, I gladly pass my crown to him.

I have finally got back to the light and have it mostly completed. OP updated and beam shots added.

What a performer. Great mod. Making that copper star thingy yourself is wicked! It would take me forever I think. Great writeup too and I love all the mouseovers. TY for sharing.

Thanks Ledsmoke. That copper star did take me a lot of time. I learned from it, but don't see using that approach again. Will try something different next time that I hope is easier.

EDIT: I should add that this light would be easy to mod with just a Noctigon and driver swap. I just wanted to try some stuff out. OP updated with more info. Probably won't be doing much to this light for now. I'm starting an ECU build and swap for one of my cars.

What an amazing effort. I admire your electronic work and metal working. The result was well worth it going by your pictures. Thanks for sharing.

Edit, As far as I'm aware there are no isolators available for the MTG led.

Thank you very much MRsDNF.

Seems like a good business opportunity, those MT-G2 isolators. Any vendors listening?

Nice photo!

Great mod and write-up!

Which of your (modified) MT-G2 lights are your favorite?

Thanks wight,

It was taken outside during the daylight (in shaded area) on firefly/moonlight mode (PWM 1). Camera about 3 - 4 feet away so that most of the reflector was lit up. I couldn't tell then, but I was just a smidgen off from center which bothers me to no end.

Thank you RaceR86,

Hmmm, None of my MT-G2 satisfy me yet for various reasons. Beam pattern wise, I like the UF-T08, because it has great throw and wide spill.. But, it's a long light with tail switch. I've started to install 2 side switches on it, but this light interrupted the process. Most of the others have too small of a reflector, battery capacity, or heat sinking.

This 7G10 is starting to bother me weight and grip wise. The mass is great for heat sinking. I don't find it front heavy. Just, heavy and for some reason it feels like it could slip out of my hand easy if I held it long. I wouldn't want to carry it on a long hike.

The 7G10 has become my new night stand light though, displacing my Sunwayman D40A. It has such a wonderful moonlight level (PWM 1) that is perfect for moving about the house in the dark. The UI lets me also take it straight to High or Strobe from the Off Mode. So I literally could temporarily (maybe more) blind an intruder. It also is useful for going to a door in low mode, opening the door to outside and then switching to High to find what went bump. If you haven't tried this FW yet, I highly recommend you give it a shot.

EDIT: Fixed a typo and added some wording.

Something in my driver mod is causing high parasitic drain. Last night the cells were down to close to 1 volt each. I've put a warning message at the top of the OP.

You could try to see if it’s in a measurable range on your DMM. That would make it easier to troubleshoot. If you’ve got spare parts it might make sense to build a clone of your driver for bench testing instead of having to repeatedly tear down this light

Thinking my DMM's are not sensitive enough, but I will give it a shot. Excellent idea on the clone.

This is the same driver that froze up in a medium mode a couple times. You and ToyKeeper suggested that it could be corrupted FW or MCU. Maybe this problem is related. I guess the clone could be a useful tool in helping trouble shot that type of problem too.

Another thing to consider, I changed the LVP resistors and the Sleep cutoff setting in the FW, but never tested those final 2 changes. Guess I can test that first since it is a fairly quick process.

Thanks wight. It may be a while before I get to it, but I'll report back on results.

If the light is getting pulled down pretty quickly it may be measurable on a cheap meter.

I wouldn’t worry about low voltage step-down or cutoff. I assume when you say sleep you mean what I call LVC (cuttoff), right? If so I can’t see how changes there would cause parasitic drain.

The firmware might not be sleeping the MCU properly in “off” mode. That would cause 3-8mA or so of parasitic drain I think. I’d try to measure it and if it’s measurable then flash the regular STAR momentary and see if that fixes it.

Yes, LVC. More important than sleep, it is also supposed to turn off the PWM that ends up opening the gate. I agree it doesn't seem like the culprit, unless I changed the value from 115 to 12 instead of 120, or some mistake like that.

Another idea just came to mind. There is some light that was recently determined to not totally shut off when the voltage sense resistor bank was shorted. Don't recall which light. It's fairly recent. Maybe adding two R33's is causing the drain. A few possibilities to eliminate.

I really like your idea of trying to replicate the driver first to see if it behaves the same way first. After the problem is hopefully identified and corrected, I could use the clone in one of several lights that are waiting for some attention.

Sounds like a good UI, although im not that into tactical stuff. Still, I would like to try it when I eventually get around to flashing drivers... :)

[quote=ImA4Wheelr]

Hmmm, None of my MT-G2 satisfy me yet for various reasons.

[/quote]

One day you and I might have to realize that there is no such thing as the perfect flashlight. Until then, we will continue to buy and mod! :beer:

No sure if it's tactical FW or not, but it's very sweet. JonnC and Tom E made something nice with that. I know, it's hard to detect that I like it a whole lot.

One flashlight that I really like a lot for a whole bunch of different reasons is that TK75 you reported on here. Mine is still unmodded. My wife and I are using it all the time.

MT-G2 + versatile UI with super low and extreme regulated output. Quite nice form factor, etc.. Who wouldn't like it? :) Seems like you have created a great light..

Yeah, the TK75 is a sweet light. The one in my mod thread got sold to a local (I had a feeling he would choose that light after testing it). So Im making another one for me. Work in progress, but I cant wait to have one up and running again. Might play around a bit with emitters and maybe do some experimenting with DC-fix...

What would be a brighter light? Stuck between crelant 7g10 mtg2 or thrunite tn30. Never seen them in person. Hoping someone in here has both and can help me decide.

Hi, jamesjackson and welcome to the forum. I don't have a TN30, so take my input with a grain of salt.

Stock, the TN30 will trounce all over the 7G10. The 7G10 is severely under driven and has other significant issues that need to be corrected to make it competitive with the TN30. Not sure which one would win if both were modded. I would think the 7G10 would win due to 15mm wider reflector, more cell capacity and better heat sink potential.

ImA4Wheelr, thanks for the lead to your mod, excellent info!! Bookmarked! This will come in handy!!! :beer: