COURUI DO1 'Big Head' (Black/GRAY NOW AVAILABLE) $29.99 @ Gearbest ( use coupon: gbcourui) A long-throw modder's light!

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Cereal_killer
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My buck driver. Otherwise you can run 6 18350’s and a FET driver.

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

wight
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Cereal_killer wrote:
My buck driver. Otherwise you can run 6 18350’s and a FET driver.
It’s probably important to point out that this driver is not available, finished, or even prototyped yet (development thread?). So far the three high-powered buck projects I’m aware of on BLF have fizzled (gmarsh’s fizzled I think), stalled (me!), or turned out to have unforseen limitations (Mattaus). So while Cereal_killer may beat the spread in the end, it’s probably important to consider that the driver he mentioned doesn’t exist yet when you’re purchasing one of these lights!

IMO there isn’t currently a great way to mod this light for MT-G2. The 6 * 18350’s and FET driver suggested by Cereal_killer may be your best bet… but there are easier lights to mod for MT-G2 – ones that don’t involve a fistfull of 18350’s. I’m not knocking that method, but I think most of us would rather steer clear of the limitations 18350’s bring with them for such a bulky light.

That said, I think a series conversion for this light sounds like a nice idea and a good thing to shoot for. Hopefully it’s achievable in a way that doesn’t require a crazy amount of work.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

L4M4
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Hi!

I don’t like the 6* 18350 solution either.
I don’t have any of those and don’t want to.
But plenty of 18650…

Shouldn’t be that big problem, to get the 3 18650 in Series. But then you need a really good driver or you loose a lot of energy.
Is there a driver that can do that?

I have a 6V MT-G2 just laying around here, so I’m very interested in modding this light.
I ordered this light as a host for the MT-G2 – but would like the Courui more.
http://www.banggood.com/Rocher-LS01-CREE-XM-L2-1A-900lm-Tactical-LED-Flashlight-p-937607.html

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What about modding the Courui for two of the cells in series and have the third a "dummy slot" not connected at all (i.e. don't use it). 

-Garry

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L4M4
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Then it’s better to use a 2*18650 light.
I just couldn’t use a light, that has one empty battery-slot.
I just couldn’t Silly

So maybe the Courui is not the best host for the MT-G2. I think, the Roche LS01 is better, even though I don’t like those thin 18650 Bat-Tubes very much.

wight
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L4M4 wrote:
Hi!

I don’t like the 6* 18350 solution either.
I don’t have any of those and don’t want to.
But plenty of 18650…

Shouldn’t be that big problem, to get the 3 18650 in Series. But then you need a really good driver or you loose a lot of energy.
Is there a driver that can do that?

I have a 6V MT-G2 just laying around here, so I’m very interested in modding this light.
I ordered this light as a host for the MT-G2 – but would like the Courui more.
http://www.banggood.com/Rocher-LS01-CREE-XM-L2-1A-900lm-Tactical-LED-Flashlight-p-937607.html

garrybunk wrote:

What about modding the Courui for two of the cells in series and have the third a “dummy slot” not connected at all (i.e. don’t use it). 

-Garry

L4M4 wrote:
Then it’s better to use a 2*18650 light.
I just couldn’t use a light, that has one empty battery-slot.
I just couldn’t Silly

So maybe the Courui is not the best host for the MT-G2. I think, the Roche LS01 is better, even though I don’t like those thin 18650 Bat-Tubes very much.

Getting the 3 cells in series in a nice way looks like a bit of a problem from where I’m standing. Assuming you got that figured out in a way that was satisfactory for you, I think the driver is not too big an issue. You should check the teardown thread for more info, but I think that there is enough space for a buck driver such as the HX-1175b or maybe the “new DRY” driver. It should get pretty tight with either driver though, so I’m not positive that they will fit – there is enough diameter but you might have to do some serious grinding on the driver shelf. Either of those drivers should be an acceptable choice for MT-G2 on 3s.

If you just had 2s you could use a DD driver or linear driver, both of which can be very small, so no problem there.

If you want to know for sure that you can do the conversion in a nice way you should focus on something which is already setup for 3s, 2s2p, 2s, etc.

Later if we get a good 3s conversion for this light the situation will be totally different!

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

Cereal_killer
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wight wrote:

The circuit design is running on my breadboard(sans PWM input at the moment), both an XM and an MT (both 2 & 3s cells, have to tried 4) only problem I encounter was that the sense resistor and diode get hot quick just pinned onto the breadboard, my first test boards went to fab Monday so I’ll have a better test setup soon. I also just bought another MT to mess with (my one old test one is in very very bad shape)

Also worth pointing out- it’s very typical application of the chosen buck chip so I was able to exactly follow their spec’d layout design, I’m more than confident its a viable option. I have several different design test boards on order (tho no Courui ones yet till I get the one from DX to have the driver in hand while designing that board). If I wasn’t sure this will work out I wouldn’t have bought multiple hosts and more importantly spent the amount or time I have on this. This is my full time job now days, I can’t afford to waste any time/money on project that won’t payout (also why I’m using a standard FW and not new code, to decrease the time till the first batch of units are produced and ready to sell as much as possible). Same reason why I’m not trying to come up with some all now circuit or do something crazy, this is all proven circuit’s that work exactly as intended when following the MFG’s spec’s (which is what I’ve done). I’m not at all saying mine will be better than you guy’s, all I’m getting at is my project isn’t actually that ambitious at all, I’ve got quite a bit invested in it already and it’s not some side project I’m doing in my spare time… In short, this thing will work, no not tomorrow but ASAP. It’s a top priority project for me (the courui’s specifically as well as the MAXIM based buck driver)

The only other concern with the courui is the series conversion with having to rotate the body (cell holder) to change cells. Because of the Courui will absolutely require the tail clicky mod so you’re not connecting the batteries all wrong while loading cells. One option I’m going to be exploring (again once I get one in hand) as a better option is modding the tail end of the light to allow drop-in cell loading from back there.

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

wight
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FWIW both Mattaus and I very closely followed the application circuits. (gmarsh had a little bit crazier project going on)

All I’m saying, and not as an insult or slight or anything like that, is that I’d prefer for it to be 100% clear that you don’t have a driver yet, that the driver will likely require one or more physical modifications to the light, and that those things have neither been pinned down or fully figured out yet. And you don’t have a host in hand.

While it may not have been intentional, your post was misleading IMO. L4M4 asked if there was an easy solution and you said “my driver,” which was/is not currently true. With luck in the future your driver will be a medium difficulty conversion since it’ll require drilling the tailcap & some other physical mod. It won’t be a drop-in solution like what you are shooting for with the TK61.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

tatasal
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The gray version is expected to be delivered perhaps tomorrow. Until it is in the hands of GB shall it be officially announced, with the corresponding SKU of that model.

Cereal_killer
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Thanks for your clarification Wight. I removed your quote from my post so it wasn’t looking like I was trying to argue with you.

Yes you are correct it doesn’t exist, yet, but again it absolutely WILL exist ASAP (not “most likely” or “if everything comes together”, it WILL happen). FWIW tterev3 just finished up his newest MAXIM based project running the exact circuit design I am…

And yes it may be a higher degree of difficulty than say a DD / linear driver would by I’m happy to do the work for people (actually that’s what I’d prefer).

Finally don’t forget- going the 2s&dummy / 18350 route will require the same tail clicky, you can’t run a Zener mod driver with a momentary button and not have a way to cut power, the Zener is always running…

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

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Hey Tom, did you take the tail cap off and check that thin wire they're using to bridge the 2 traces on the pcb? That will hold your amperage down severely. Replace that wire with a larger one or otherwise give more ground capability and your output will be noticeably brighter.

I spotted the thin film on the large MAXToch star because there was air under it at the MAXToch name. And it was shiny over the copper pads. Still haven't used mine yet...

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Cereal_killer wrote:
... you can't run a Zener mod driver with a momentary button and not have a way to cut power, the Zener is always running...

Ahhhh - really? hhmm - don't recall reading/hearing bout this. Oh boy...

Dale - yes, did read up on the Courui threads about that wire jumper, and seen your solution - plan was to do it same way you did - looked the best - the 3 jumpers. Wanted to really crank this one up with a BLF17DD driver, or equivalent, with the e-switch support and dedomed XM-L2 U3 1A on a MaxToch 31.5 or 26. Also will get a UCLp for it. Wondering if any easy way to address the heat sinking with that pill shelf. Not crazy about the threaded connection and relatively thin shelf, but it is certainly large in width, and since you don't have to worry but electrical ground, I suppose you could just use a good thermal grease in there. If you turn the shelf over, like most seem to do, the threaded connection doesn't tighten - just spins, so not a really good bond there. I'd have to work out details of vertical spacing with the LED->reflector->lens, etc., see if I need a copper shim or not, or other shelf positioning solution. It's on the bench, but not getting priority right now.

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I pulled the copper jumpers on my XM-L2 variant and put an Omten switch in there. So now off is truly off and I don't have to mess with unscrewing the battery tube to lock it out.

On my MT-G2 variant, that's what I do...unscrew it til it won't work and leave it head standing that way until I choose it for use.

I really like these, the way they fit the hand and the overall build. The XM-L2 version is probably the most useful, while the MT-G2 is more gimmicky...the wow factor.

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Thanx Dale - I'm wait'n for the gray one to be available, than I'll order my 2nd Wink. I'm thinking the JonnyC firmware is pretty good with parasitic drain, so not too concerned bout the power cutoff for now.

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Tom E wrote:
If you turn the shelf over, like most seem to do, the threaded connection doesn’t tighten – just spins, so not a really good bond there. I’d have to work out details of vertical spacing with the LED->reflector->lens, etc., see if I need a copper shim or not, or other shelf positioning solution. It’s on the bench, but not getting priority right now.

There may be some tolerance differences between lights, but with my Courui, the LED shelf is tightened down firmly onto the ledge. Is there a problem with the threads with yours I wonder?

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FmC wrote:
There may be some tolerance differences between lights, but with my Courui, the LED shelf is tightened down firmly onto the ledge. Is there a problem with the threads with yours I wonder?

Mine tightens, but only with the MCPCB side up. If I flip it, it doesn't tighten - tried it several times.

Cereal_killer
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Tom E wrote:

Cereal_killer wrote:
… you can’t run a Zener mod driver with a momentary button and not have a way to cut power, the Zener is always running…

Ahhhh – really? hhmm – don’t recall reading/hearing bout this. Oh boy…

http://budgetlightforum.com/node/31070

I have a set of test board’s on order (attiny13A controlled 7135 driver) with pads for a micochip MCP1702 voltage regulator, should be a much better option than a zener mod to protect the MCU from <5V input. If it works (no reason it shouldn’t) I will be modding my PIC drivers (as well as my personal use AVR drivers). I’d be happy to do the BLF AVR drivers to if there’s interest. The microchip vreg should be a viable option for MOM-only lights with no way to be locked out and should be a better way to do it overall then burning the excess off with a zener like we’re all doing now.

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

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Cool, sounds interesting... Do you know how much the zener diode draws in this case? Is it just a matter of the cells draining or is more problematic?

Cereal_killer
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Wight calculated it at 2mA.

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

tatasal
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For some reason the gray model was not delivered today, and tomorrow is the start of another weekend..oh no

Cereal_killer
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Is anyone’s tracking working yet? Neither of mine are, both on packages that were shipped before the last holiday.

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

wight
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Cereal_killer wrote:
Wight calculated it at 2mA.
Hah, I’ll take your word for it since I don’t remember (!). 2mA is pretty high, so that’s definitely an issue (it should drain fully charged cells in about 2 months) Actually now maybe I DO remember saying that before! heheh. 2 months sucks, ouch.

I agree with what you commented earlier – even with a 2s conversion of whatever type you’ve got that Zener problem unless you add a tailswitch. Dedicated PSU sections seem to make a lot more sense in these lights which have the space.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

wight
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Cereal_killer wrote:
Is anyone’s tracking working yet? Neither of mine are, both on packages that were shipped before the last holiday.
Have you PM’d that support person they are supposed to have on BLF? I still haven’t purchased any yet and I like you I hate to waste cash on tracking that doesn’t work.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

vestureofblood
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I paid the $9 expressmail fee and have mine in hand already.  I,m not sure if the TN ever did work, but the DHL van rolled up this afternoon.   That said... .WOOT!

 

I cannot believe this is a sub $40 dollar light.    It soooooooo awesome.    I have like 100 million ideas for building this light.   Glad I ordered 2!!       Its even better looking then I thought it would be, and smaller too...  

I was expecting a 3 18650 light to be bulky but its not.    Ultra smooth hot spot.   And best of all the factory UI is something usable for once.   First light to ever come out of china stock I can say that about.   I could not be more pleased with the purchase of this light.    Can hardly wait to start hackin.

In Him (Jesus Christ) was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.
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downlinx
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Cereal_killer wrote:
Is anyone’s tracking working yet? Neither of mine are, both on packages that were shipped before the last holiday.

my tracking still is not working. ordered 9/29

BLF Community Battery Pull Thread http://budgetlightforum.com/node/32720

tatasal
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vestureofblood wrote:

I paid the $9 expressmail fee and have mine in hand already.  I,m not sure if the TN ever did work, but the DHL van rolled up this afternoon.   That said… .WOOT!

 

I cannot believe this is a sub $40 dollar light.    It soooooooo awesome.    I have like 100 million ideas for building this light.   Glad I ordered 2!!       Its even better looking then I thought it would be, and smaller too…  

I was expecting a 3 18650 light to be bulky but its not.    Ultra smooth hot spot.   And best of all the factory UI is something usable for once.   First light to ever come out of china stock I can say that about.   I could not be more pleased with the purchase of this light.    Can hardly wait to start hackin.

With comments like that coming from a guy like you, you just got me excited. Great news!

Pulsar13
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Sub $30 light. Smile

Dang it. I’ve not been excited with any of the GBs now except this one. OK well this is not even a GB, but since we have to wait for the gray version then it pretty much feels the same.

G0OSE
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Mine isn’t working either

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The parasitic drain can be reduced a Lot by Taking different resistors for Battery monitoring. I do that always on my selfassembled drivers…
The zenerdiode and Zener resistor could be optimized too, but not so much.

DB Custom
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The parasitic drain can be completely eliminated by putting a clicky switch in the tail cap. 

I really really like my Courui's, but this mod alone is the cat's meow as far as the big head is concerned, flat out does away with the parasitic drain potential and keeps your cells ready to go. 

This is one of the lights I could never let go...

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