*BLF LT1 Lantern Project* (LT1 GB is Active! (first batch available)

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Lux-Perpetua
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Please find below the updated manual, checked and edited contentwise by sbslider and stereodude (once again, thank you guys!) and updated layoutwise by me today. You can also download the manual conveniently from my Sofirn sharepoint on Google drive, click ► here ◄.

 

nicois
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A couple of pedantic suggestions. Feel free to ignore any or all of them:

Its easy to do. -> “It’s easy to do”
While ramping the LT1 blinks -> “While ramping, the LT1 blinks”
The LT1 has two different ramp modes; -> “The LT1 has two different ramp modes: “
Not everything is covered in this diagram, please read the text -> “Not everything is covered in this diagram; please read the text”
theUI -> “the UI” or stepped). . -> “ or stepped).”

The instructions are great. I wish all my lights had such detailed information!

slimkango
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Please put me down for two. Thank you!

amishbill
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Lux-Perpetua wrote:

Please find below the updated manual, checked and edited contentwise by sbslider and stereodude (once again, thank you guys!) and updated layoutwise by me today. You can also download the manual conveniently from my Sofirn sharepoint on Google drive, click ► here ◄.


 



Lux, sbslider, stereodude – that updated manual is…. Nice. Thumbs Up

DIY LT1 battery wrap image. "PDF on Google Drive":https://drive.google.com/open?id=1IHIEOi1NXu868IYNCzIM7D2Ulpxchmww

Fresh Sanyo NCR18650GAs already wrapped "for sale HERE":http://budgetlightforum.com/node/69120 if you like.

ikkentobi
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great work – thanks guys!

DBSAR
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Lux-Perpetua wrote:

Please find below the updated manual, checked and edited contentwise by sbslider and stereodude (once again, thank you guys!) and updated layoutwise by me today. You can also download the manual conveniently from my Sofirn sharepoint on Google drive, click ► here ◄.

Looks good Thumbs Up

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

badtziscool
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Please add me to the GB list for one lantern.

Thanks!

Island_Bright
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Please put me down for one. Thx!

lumenlite
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Good Afternoon,

Please add me to the list for one lantern.

Thanks

Mr.Scott
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Lux-Perpetua wrote:

Sofirn apparently printed their initial version of the manual already, i.e. customers of the first 500 pcs (batch #1) are encouraged to use the updated manual hosted on my sharepoint, see post no. [tba].

So you are saying the first 500 customers will have the LT1 limited-edition collectors-item manual.

Stereodude
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Mr.Scott wrote:
So you are saying the first 500 customers will have the LT1 limited-edition collectors-item manual.

Yes, “limited-edition” in that your ability to read and understand it will be quite limited. Or, limited in that the behavior and features of the LT1 will align with the descriptions in the manual. Grad
SIGShooter
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Stereodude wrote:
Mr.Scott wrote:
So you are saying the first 500 customers will have the LT1 limited-edition collectors-item manual.

Yes, “limited-edition” in that your ability to read and understand it will be quite limited. Or, limited in that the behavior and features of the LT1 will align with the descriptions in the manual. Grad
That’s unlikely to deter anyone from ordering as soon as they can!
leftdisconnected
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Lux-Perpetua wrote:

Please find below the updated manual, checked and edited contentwise by sbslider and stereodude (once again, thank you guys!) and updated layoutwise by me today.

Many thanks to everyone who worked on the manual in marathon mode over the past week. While it was unfortunate that the matter did not come up sooner, we can be grateful that the issue arose before more copies were printed Smile . Another week and buyers would have been stuck with the old manual.

The grammatical corrections by nicois are worth including in the reference manual, but they are not critical to using the lantern. Though many will deem these corrections irrelevant, it is actually quite impressive to receive a manual for a Chinese product that contains accurate grammar in your local language; such details are extremely rare today and they are surprisingly effective at conveying quality and value, even if non-critical.

Thanks again!


Mr.Scott wrote:
So you are saying the first 500 customers will have the LT1 limited-edition collectors-item manual.

Yup. Cash It’ll be worth a fortune someday.

RobAllen

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Do we have any confirmation on the colors yet? Or how long of a gap there will be between the first 500pcs and the second batch?

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RobertB wrote:
fuzun wrote:
This light was meant to be cheaper than the Q8. I don’t think it is budget anymore.

BlueSwordM wrote:
It was never meant to be cheaper than the Q8.

For an 8x LH351D lantern with a injection molded high quality shade cover, included cable, a much more advanced driver, 49$US is quite the good price for such a high quality lantern.

I prefer paying for quality once without no problems, rather than having to deal with issues that’ll cost me more in the long run.

Yes it was. This project started 1 year and 8 months before you joined BLF


I just did a quick search. If you can prove me wrong, please do. The first post I found that tried to figure a price point was one by djozz, where he speculated it could be done by $30. But that was quickly followed up by The Miller, who was actively involved on the team at that time, where he said a reasonable price should be around $50. Back then, it was still expected to have only one LED and a Qlite driver with a TP4056 chip added for charging. A newer, advanced driver design didn’t come along until a month after The Miller predicted that price point. I think Den and the team have done well to keep it as low priced as it is, considering how much more has been added to the design since then. Cash

HERE is the post from The Miller.

Like I said a few posts back, it was never “reasonable” to assume the LT1 would be cheaper than the Q8.

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

amishbill
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Stereodude wrote:
Mr.Scott wrote:
So you are saying the first 500 customers will have the LT1 limited-edition collectors-item manual.

Yes, “limited-edition” in that your ability to read and understand it will be quite limited. Or, limited in that the behavior and features of the LT1 will align with the descriptions in the manual. Grad

Your words imply that anyone has ever been able to successfully use a Chinese fine-print “manual” without external assistance, either in the form of a magnifying glass, zoomed in picture, or internet search. Evil

DIY LT1 battery wrap image. "PDF on Google Drive":https://drive.google.com/open?id=1IHIEOi1NXu868IYNCzIM7D2Ulpxchmww

Fresh Sanyo NCR18650GAs already wrapped "for sale HERE":http://budgetlightforum.com/node/69120 if you like.

Lux-Perpetua
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Stereodude wrote:
Do we have any confirmation on the colors yet? Or how long of a gap there will be between the first 500pcs and the second batch?

Cissy told me today that production of batch no. 2 (lot size significantly larger than 500pcs) is about to commence beginning of October with a runtime of about 20 days. So, suppose that the first 500 pcs will be sold out immediately I expect a „supply gap“ or bottleneck of about 3-4 weeks until stock is replenished and goods ready for sale. Now, we‘ll have to wait and see how supply & demand work together.

DBSAR
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Stereodude wrote:
Do we have any confirmation on the colors yet? Or how long of a gap there will be between the first 500pcs and the second batch?

I know Sofirn is aware of the colors, but has not confirmed with us of the colors that will be available when the orders begin.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

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Lux-Perpetua wrote:

@Toykeeper: Can you please confirm that the UI chart (see ► here ◄) for the LT1 lantern is the final version? I intend to incorporate your nice UI chart into the updated manual

I’d suggest using the larger version instead, for higher quality.

Anyway, if any updates are made to the diagram, it’ll be at the same URL.

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I agree with DavidEF.

There are so many features that have been added over the years it’s not even funny.

1. The TP4056 was replaced with a TP5100. Being a 5-18V buck converter, the price difference between both is negligible.

2. We went from probably using 4x XP-Ls of each CCT, to 4x LH351Ds of each CCT, to 8x LH351Ds of each CCT.

3. The driver used uses a more advanced design, and a much more advanced software design, which costs money to implement and test.

4. It includes a USB-C cable.

5. It uses an injection molded custom plastic shade. High quality high efficiency custom shades cost a lot of money to make, especially in smaller quantities.

So, a 10$US bump over the BLF Q8 doesn’t seem unreasonable at all.

I think making lights inexpensively is good without too many compromises, but trying to make it too cheap is extremely dangerous in terms of cost-cutting.

TLDR: Not going to talk about this anymore.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

DBSAR
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BlueSwordM wrote:
I agree with DavidEF.

There are so many features that have been added over the years it’s not even funny.

1. The TP4056 was replaced with a TP5100. Being a 5-18V buck converter, the price difference between both is negligible.

2. We went from probably using 4x Nichia 219Cs of each CCT, to 4x LH351Ds of each CCT, to 8x LH351Ds of each CCT.

3. The driver used uses a more advanced design, and a much more advanced software design, which costs money to implement and test.

4. It includes a USB-C cable.

5. It uses an injection molded custom plastic shade. High quality high efficiency custom shades cost a lot of money to make, especially in smaller quantities.

So, a 10$US bump over the BLF Q8 doesn’t seem unreasonable at all.

I think making lights inexpensively is good without too many compromises, but trying to make it too cheap is extremely dangerous in terms of cost-cutting.

TLDR: Not going to talk about this anymore.

It started out as a single XP-L LED, with a modified 105C Q-Lite driver, in a butchered & modified SkyRay King body Big Smile then evolved to what we have now, which is still a great price (even at the full non-GB price after) compared to everything else i tested, built, used, etc.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

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Getting anxious, got in on this and the charger build. Probably will get the wrapped batteries ordered soon. Even ordered a 60w solar panel with discount codes from here lol. Thanks to the build team.

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saypat wrote:
I’m probably spelling this backwards, but WOW! Appreciate your post Phlogiston
Thank you Thumbs Up

BlueSwordM wrote:

[calculations in BlueSwordM’s original post ]

TLDR:
5×7135 = 635 lumens
7×7135 = 860 lumens

I normally estimate to the low end, to minimise the risk of disappointing anyone. Your numbers would be fine by me Smile

sbslider wrote:
ToyKeeper guessed 600 lumens with 5 channels enabled, it sounds like everyone is in that ballpark.
Thanks, that’s good to know. 600lm ± 6% between three of us inspires confidence.
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ToyKeeper wrote:
I’d suggest using the larger version instead, for higher quality.

Anyway, if any updates are made to the diagram, it’ll be at the same URL.

So why are the max and min called the floor and ceiling? And why is a click and hold just called a “hold”?
amishbill
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Stereodude wrote:
ToyKeeper wrote:
I’d suggest using the larger version instead, for higher quality.

Anyway, if any updates are made to the diagram, it’ll be at the same URL.

So why are the max and min called the floor and ceiling? And why is a click and hold just called a “hold”?

It’s possible to go below a floor and above a ceiling? And somewhere, there will be a printing error and “chold” will be dramatically misunderstood.

A real answer – “click” usually implies press & release, where “hold” implies press & wait. Space in a manual or instruction set is a finite resource. Sometings you have to make the best compromise between an ELI5 answer and the space available.

DIY LT1 battery wrap image. "PDF on Google Drive":https://drive.google.com/open?id=1IHIEOi1NXu868IYNCzIM7D2Ulpxchmww

Fresh Sanyo NCR18650GAs already wrapped "for sale HERE":http://budgetlightforum.com/node/69120 if you like.

ToyKeeper
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Stereodude wrote:
So why are the max and min called the floor and ceiling? And why is a click and hold just called a “hold”?

The min and max levels are determined by the hardware capabilities, while the floor and ceiling are configurable by the user.

About the click / hold terminology, it’s there to eliminate ambiguity. There are four or five different notations floating around, and their phrasing overlaps, which can make things confusing. So I used one with a non-ambiguous starting point.

  • 1H = hold = press button and keep holding
  • 1C = click = press and release
  • 2H = click, hold = press, release, press, hold
  • 2C = click, click = press, release, press, release
  • 3H = click, click, hold
  • 3C = click, click, click

… and so on. The diagram intentionally gives enough information to unambiguously establish the pattern.

If the notation is shifted by one so it starts at “click & hold”, it’s unclear whether this means “press, hold” or “press, release, press, hold”.

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Please put me down for two.

Thank You

DBSAR
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BlueSwordM wrote:

Since optical efficiency will be slightly higher than 80% due to only having a shade, 900 lumens with 7×7135s is doable.

TLDR:
5×7135 = 635 lumens
7×7135 = 860 lumens

That is close now to what i can estimate in comparison tests to average household LED bulbs, and using my light sphere with a lux meter comparing the lanterns output to brand name bulbs, is roughly 600 lumens with the tint mix at roughly 4000K for the 5-7135 config on maximum, and around 800 lumens on the same tint setting (4000K average with all eight LEDs running close to equal brightness) on the 7-7135 config. I want to do full run time tests using the best 3500 mAh HC cell sets i have, (using the stepped-output modes but every mode 80% of Max or lower seems to run for days regardless.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

DBSAR
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Lux-Perpetua wrote:

Please find below the updated manual, checked and edited contentwise by sbslider and stereodude (once again, thank you guys!) and updated layoutwise by me today. You can also download the manual conveniently from my Sofirn sharepoint on Google drive, click ► here ◄.

I been reading over the manual, most everything looks good so far. (though on the first page along with the manual design-names mentioned, the rest of the BLF LT1 team names should be mentioned/listed to be fair too.
There are some minor parts that need to be edited, (the section where it states the LT1 can be used while charging though the maximum will be reduced, when the lantern is charging with batteries in the lantern it will run on all modes, even maximum, ( but on maximum the lantern load exceeds the charger capacity, thus slowly draining the cells. (When the LT1 is running on the USB-C power alone, then yes the maximum output is reduced, and i recommend not to run it on higher than average 70% output to not overload the 5100 chip.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

DBSAR
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I have to apologize to everyone, as the last couple weeks i have been a little overloaded with family issues, work, and renovations for my impending forced-house selling in a few months, thus my free time as been really crunched down this past month. Tired

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

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