Modding a Perfectly good EA8, for no apparent reason - Finished! - Beam Shots are up!

Thanks, Justin! I put a few in my cart and am looking around that site some more. I did find these and it would be great for someone who can program a driver for it. 5-way tactile switch. On/off with a press in the middle. A tilt to either side to scroll forward or backward through modes and tilt forward or back to increase or decrease brightness. I think it’d make a great interface. :wink:

If you could find a 9V MTG2 you might get away with 8S direct drive…

unfortunately, cutter only has 6V and 36v

WOW! Can you make a difference in a light or what!!??

See.... this is why an Old Lumens Mod is just so danged special!!! Thanks for sharing Justin!!

Dan.

Really like the ano/polish on the head.

This might be a good place to use my “higher voltage” 7135 driver mod. Then you could use 6s 1p with two spacers. 2/3 AA and you could run 6s 2p.

And you gotta know how to work them.

Could you not use old PC on switches for this?

So, from what I read here and in other threads, to use the MT-G2 with a "budget" driver, I would be best off using two Li-ion cells in series, to keep the voltage about 1v greater than the buck driver and when it goes below, it goes direct drive, but the voltage is then low enough to not hurt the LED. Is that about right?

So to keep 4S/2P it only makes sense to put in an XM-L or XM-L2 with a DrJones programmed driver, since I do not want to use spacers or dummy cells to do a 6S NiMH configuration.

I think that about sums it up?

Hmmmmm...... Rats!

Ok, so if I did break down and go 6s NiMHs, which "budget buck driver" would be the best or possibly the most reliable? I have no clue, so help me out here with some links to some.

Any of these drivers work?

http://www.lck-led.com/5000ma-driver-modes-p-935.html?cPath=135

http://intl-outdoor.com/xml-multicell-circuit-board-35a-ouput-55126v-p-543.html

http://intl-outdoor.com/xml-multicell-circuit-board-3a-55126v-p-361.html

http://kaidomain.com/product/details.S020121

O-L - you don’t need to go 6S to use a buck driver as it really won’t care what voltage the battery is as long as it’s above Vf+1V and below the specced upper limit of the driver. In fact, 8S would be better as the current draw from the battery would be slightly lower.

I know that Taskled drivers are expensive, but you do get what you pay for and there’s no “what will I get” lottery like the drivers from China.

I know, I just hate to sink $40+ into an H6Flex for a light I will want to sell once it's done. I seem to have gotten away from the "budget theme" in trying to mod different lights, but I know the H6Flex would be a good driver for the MT-G2 and 8 NiMHs in series.

The Lflex is “only” $20 and is a linear driver like a 105C but uses a momentary switch. The 6S was to possibly still use a 7135 driver with a VR chip to protect the mcu or Lflex and get the voltage up to 6V mtg territory. 8S and you’re looking at a boost driver(12V mtg) or a buck driver(6V mtg). Often for me the hardest thing to figure out is the best combination that takes into account all the limitations I’m dealing with. Only you know what those are Justin so all my suggestions are just bar napkin bs when you get down to it. It sounds like the easiest thing would be an XML, 4S2P with a DrJones driver but the mtg is still possible just harder.

I emailed George and asked him what I could use. He suggested the H6Flex with 8 NiMHs in series or the b3Flex. I’m just going off what he suggested.

yeah, the b3flex would be ideal for up to 3A, which would still be a metric ton of light and well within the capabilities of most NiMh AAs - the h6flex would be just overkill in this situation, as it’s 5A (or 6A, I can’t remember) max drive would be crazy off 1P AAs :slight_smile:

the H6Flex is adjustable and one setting is 3600mA, which is the one I would use. I think for the price difference, it might be fun to put 3.6 amps to it. Eneloops can take that, although probably not for a long period of time.

It may be a while though, due to the cost, but hopefully it will happen.

I used an overkill driver from I-O that would work. It’s a buck-boost, which works fine for driving the MT-G2 from 2 18650, so an 8S would work. I think there must be better drivers for the task.
I think a 4S2P config is better, which limits you to XM-L/L2 or MT-G2 with a boost driver.
This might work OK for driving an MT-G2 from 8S NiMH.

More photos in the OP.

I probably will wait till I can buy one of the Taskled drivers. The fact that they are thin makes a big difference in the limited space I have. I am concerned about room with the fatty drivers that take several mm of height space. When I can, I will buy one of George's drivers and finish the build.

That is so sweet lookin. Someone linked to another forum for me to look at. I thought you may be interested as well.

Reserved

More photos in the OP and a question about a component. Photos in the OP show the component in question.

Those are diodes, I assume to prevent a reversed battery condition from breaking things. I would not have expected it in the tailcap though…
If you replace them with bridges you will lose that function, but you may also not care depending on the driver you use.

I was wondering if that is what they are, but it did seem strange to be in the contact plate. I may just leave them if that’s the case. Since I am going to do 8 in series, I have to put in a 3rd guide pin, so that the tail cap can only go on one way, as it can be on or 180 on now. Can’t have that with 8 in series.

I think it makes sense there, as they are somewhat sizeable components due to the current and possible heat dissipation needs, as well as to provide a battery bridge. Just checked my EA4W and according to my DMM, and it’s just a straight bridge. Guess they weren’t as concerned about reverse polarity with the little guys.

KuoH