The GT, Proto V2 arrived!, the BLF special giga thrower

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samis
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Hi,

Would like to have one, if still possible!

Many thanks for great project!

Regards,
Sami

The Miller
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Wow, WELCOME all new BLFers!
Will update the lists later!

interesting so just more power to the LED of the TN42 got the numbers up much higher, what is it driven at?

nodoubt
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The Miller wrote:
Wow, WELCOME all new BLFers!
Will update the lists later!

interesting so just more power to the LED of the TN42 got the numbers up much higher, what is it driven at?


dont know , didnt do the mod
its putting out 2500 lumens by my lightbox though, and 770 k lux, give or take
im thinking its pushing 3 amps
FrankFlash
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Hi there,
Great project!
I would like to get one as well.
Thanks.
Regards Frank

DEL
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The Miller requested that I give a little detail on the driver that we are putting together for this light. The XHP35 emitter, together with the 4S cell arrangement, presents some opportunities and challenges. On the one hand DD drivers are out – too easy to kill the emitter. 7135s are out – voltages are too high. On the other hand the 1-4 V voltage differential between the cells and the emitter (and the relatively low current) makes a buck driver ideal and relatively easy to implement.

The boards for the prototype shipped this week, should have them in hand sometime next week. The driver is built around the LM3409 buck controller chip. This chip ticked a bunch of boxes. It has also been previously recommended by RMM, based on his experience with buck drivers, and TA and Flintrock applied it in the Texas Buck driver.

Highlights:

  • It is currently using a tiny85 MCU, retaining compatibility with popular existing firmwares. We may migrate to a tiny841 or better before production starts.
  • Except for the very low modes, the buck controller will be in full analog current control mode, no PWM. Not that relevant for a thrower, but for very low modes the MCU would set the buck circuit in a low mode and then PWM it to get even lower output. The buck circuit can tolerate 20 kHz or even higher for the PWM frequency.
  • Expected efficiency of the driver is 92 %. Together with the real current control it will provide for a pretty efficient flashlight.
  • We have a 46 mm diameter driver. This gives a lot a flexibility for component selection. To simplify sourcing, and limit cost, the most popular and common formats were selected for parts.
  • The nominal design is for 2.5 A, but all components are generously sized and it would not take much to get 5 A for other applications.
  • This is an ‘e-switch’ driver, to be controlled by a small tactile switch only. The expected parasitic drain is a little high, around 0.14 mA. This is mostly due to the LM3409 chip and can be managed better when/if we upgrade to an MCU with more IO pins.

The board is now shared on OSH, for anyone that wants to play along at home Smile . It will, however, change before this is all done:

nitrader0
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Please add me to the list.

Thanks.

DavidEF
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Very nice, DEL!

EDIT: What does a 46mm board fit into?

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
-Ayn Rand

The Miller
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SRKs David Smile

DavidEF
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Oh yeah! SRKs! Big Smile

EDIT: Hmm… at 2.5A it isn’t interesting for a SRK. But, if it were built to 5A output, that would make a VERY interesting SRK!

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
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The Miller
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DavidEF wrote:
Oh yeah! SRKs! Big Smile

EDIT: Hmm… at 2.5A it isn’t interesting for a SRK. But, if it were built to 5A output, that would make a VERY interesting SRK!


Well maybe someboy wants to mod a Boss1
that would be awesome Big Smile
Tom E
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I was thinking of a possible mod for a dedomed XPL or XP-G2 in the GT, bucking down the 16V to 4V, 5A+. Should gain throw I'm think'n. Maybe 1.5+ mcd. Hopefully can be done with just some part changes on the driver.

But first is first of course -- let's do the XHP35 HI and be the best reflector thrower --- in the world? smile

DEL
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Double-up (half-down?) the sense resistor and this guy will do 5 A. Will run a little hot of course. Efficiency will be somewhat lower at 4 V output, nature of the (buck) beast.

EDIT: Running 1S, like in a standard SRK, is not really an option.

DavidEF
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DEL wrote:
Double-up (half-down?) the sense resistor and this guy will do 5 A. Will run a little hot of course. Efficiency will be somewhat lower at 4 V output, nature of the (buck) beast.

EDIT: Running 1S, like in a standard SRK, is not really an option.


Well, I was assuming the work required to change SRK battery tube to a 4S set-up. That’s why I said that this driver wouldn’t be very interesting in SRK. The same performance can be gained from a regular 1S driver and 4P cells. But, it might be worth the battery tube 4S mod if the driver were bumped up to 5A.

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
-Ayn Rand

Texas_Ace
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If it could handle 5A you could run 4x LED’s in series @ a regulated 5A each (the same as to 20A with 4p LED’s for those not aware) and have a pretty nice amount of output.

For example the Q8 would make about the same power it is now but would have a fully regulated non-PWM driver.

Know guns, know peace, know safety. No guns, no peace, no safety.

The ultimate result of shielding men from the effects of folly is to fill the world with fools. --Herbert Spencer , English Philosopher (1820-1903)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT - XHP70.2 P2 - XHP50.2 J4 - Samsung IH351D

Complete collection of all my LED test Charts

DavidEF
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Texas_Ace wrote:
If it could handle 5A you could run 4x LED’s in series @ a regulated 5A each (the same as to 20A with 4p LED’s for those not aware) and have a pretty nice amount of output.

For example the Q8 would make about the same power it is now but would have a fully regulated non-PWM driver.


Yeah, or if you got some very low Vf LEDs maybe even squeeze a fifth one in there. You’d lose a little of the lower voltage end of your cells, making for an automatic LVP. But, you’d gain lumens on the full charge and possibly a bit more driver efficiency. Even better, get a 10x SRK clone and do 5S2P with low Vf emitters and get a little more.

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
-Ayn Rand

thijsco19
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Nice looking driver, those graphics are awesome.

teacher
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Tom E wrote:

But first is first of course — let’s do the XHP35 HI and be the best reflector thrower —- in the world? smile

That sounds like plan…… A great plan in fact. Thumbs Up

“let’s do the XHP35 HI and be the best reflector thrower —- in the world? Smile

I like it……….. Wink

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The Miller
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Really have no idea how much space the Boss1 driver cavity has
But it has a nice big reflector and if this driver could be placed on top of original driver a mod to make it 4S with 26650 should be feasible placing a XHP35HI in it

A380
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DEL wrote:
Double-up (half-down?) the sense resistor and this guy will do 5 A. Will run a little hot of course. Efficiency will be somewhat lower at 4 V output, nature of the (buck) beast.

EDIT: Running 1S, like in a standard SRK, is not really an option.

Not 1s, but could it drive a 3v led with 3s batteries?

Tom E
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Pretty sure the BOSS1 is standard SRK size, but can't find the diameter in my notes:

I hit over one mile on mine, dedomed XPL (696 kcd), but later with focusing hit ~720 kcd.

DavidEF
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Hey, what about 2S? Could this driver do that into a ~6V emitter? Or is it good for 4S only? I’m thinking about a SRK with 18350’s stacked inside, feeding some XHP-50’s or something like that. Then, there’s no need to re-arrange the battery tube.

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
-Ayn Rand

Wieselflinkpro
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Boss1 has 4 × 26650, thats not SRK Size.

Tom E
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Wieselflinkpro wrote:
Boss1 has 4 x 26650, thats not SRK Size.

Of course, but not sure bout the driver size - can measure it later.

The Miller
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I know the Boss1 is different but maybe it fits to place this driver above the original empted driver, with modding to make it 4S and a XHP35HI would make a nice light.

As a test platform for those up for it.
But maybe after the first test on the bench are done somebody can adapt the GT driver so that it fits in a TN42. A DEL Ton E designed Narsil driven TN42 sounds pretty sweet.

Wieselflinkpro
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The Miller wrote:
I know the Boss1 is different but maybe it fits to place this driver above the original empted driver, with modding to make it 4S and a XHP35HI would make a nice light.

I dont know if there is enough space for it. There is realy verry less space between driver and shelf.

German http://www.taschenlampen-forum.de/threads/palight-boss1-xhp35hi-2-5a.49445/
English https://translate.google.de/translate?sl=de&tl=en&js=y&prev=_t&hl=de&ie=...

German http://www.taschenlampen-forum.de/threads/review-palight-boss1-xm-l2-1-4...
English: https://translate.google.de/translate?hl=de&sl=de&tl=en&u=http%3A%2F%2Fw...

Here is a A17DD_L on top of the standard-driver. But the pictures are not aviable without account:
German http://www.taschenlampen-forum.de/threads/vorstellung-palight-boss1-goes...

Texas_Ace
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DavidEF wrote:
Hey, what about 2S? Could this driver do that into a ~6V emitter? Or is it good for 4S only? I’m thinking about a SRK with 18350’s stacked inside, feeding some XHP-50’s or something like that. Then, there’s no need to re-arrange the battery tube.

I am not sure what components were selected but the buck IC itself can drive any combo of input and output voltage as long as the output is less then the input. Just a matter of what components are installed on the driver.

I had wanted to do a buck driver when this project started but no one was offering to help with the EE of it at the time. So the only option was the Texas buck which was not an option due to cost.

Know guns, know peace, know safety. No guns, no peace, no safety.

The ultimate result of shielding men from the effects of folly is to fill the world with fools. --Herbert Spencer , English Philosopher (1820-1903)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT - XHP70.2 P2 - XHP50.2 J4 - Samsung IH351D

Complete collection of all my LED test Charts

Sonofspectrum
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I have been watching this from the start and tried my hardest to resist but I give in.
Please add me to the list.
Thank you.

It's moments of madness that keep us sane.

DEL
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As TA said, the driver should work in any arrangement where the battery voltage is sufficiently higher than the emitter(s) voltage. That said, efficiency suffers when going to the extreme, like 4S battery to 3 V emitter. This is just a fact of life for (non-synchronous) buck convertors.

3S to 6 V emitter(s) will be a pretty nice setup.
2S to 3 V should be fine.
2S to 6 V will probably not stay in regulation for very long.

With the current components, the driver will not work in a 1S setup. It could be made to work with a few component changes, but it will drop out of regulation too fast.

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This light is huge. For me maybe it will be a shelf queen, and pretty expensive for me. My most expensive light was the Convoy L6. I almost asked to remove me from list but it is so unique that I can not miss this so I’m staying on the list and wait Big Smile

The Miller
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Heheh you never know
Having 1 S70 I thought no more power was needed
Now a S70s at front door (when night falls I turn it on standby so the lighted switch shines reassuring)
A L6 at back door ground level
A TN42 at back door first floor
A S70 near back door first floor

I tend to use the most powerful
So well just know it will be the GT and Q8 at back door first floor and then the TN42 will be placed at front door besides the S70s.

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