*BLF LT1 Lantern Project)-3rd production batch coming late march

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BlueSwordM
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Another reason for only using 4 LEDs is the intercompatiblity with the BLF Q8 MCPCB.

I would love easy MCPCB swaps.

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

sbslider
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Kendo wrote:
I’m intrested

got ya at #820 on the interest list

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O26Rcr
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How about we let DBSAR continue down the road he has decided to travel with this light? Opinions are fine, (after all, this is one), but he has time, effort, and tangible results to show for his work. Impressive results at that.

Throwing suggestions out for lower power LED’s, or different numbers of them to make it easier for you to mod are kind of a slap in the face to the work he has done already. If you want a particular style of lantern, grab yourself a Q8 and have at it.

I’m quite happy with his intent to use 8 emitters, and having the ability to adjust the temp. If I wasn’t, I wouldn’t be on the list for four of them, (and possibly more before it’s in production).

djozz
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O26Rcr wrote:
How about we let DBSAR continue down the road he has decided to travel with this light? Opinions are fine, (after all, this is one), but he has time, effort, and tangible results to show for his work. Impressive results at that.

Throwing suggestions out for lower power LED’s, or different numbers of them to make it easier for you to mod are kind of a slap in the face to the work he has done already. If you want a particular style of lantern, grab yourself a Q8 and have at it.

I’m quite happy with his intent to use 8 emitters, and having the ability to adjust the temp. If I wasn’t, I wouldn’t be on the list for four of them, (and possibly more before it’s in production).

I do not agree. The suggestions that I give are unrelated to the work that Den has done, his design ideas and field test have been very important for making a great BLF-lantern. But I think I can add genuine good ideas and think it is a chance missed if they have not at least been discussed in this thread.

I think BLF is all about freely and perhaps recklessly posting new ideas and then discuss them. It is how our present modding techniques have been invented and refined, and how the BLF designs take form.

DBSAR
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BlueSwordM wrote:
I don’t think we should be doing an 8 LED MCPCB.

It would raise costs by quite a bit.

I think 2 Samsung LH351Ds 3000k and 2 Samsung LH351Ds 5000k would be just perfect.

Cost is definitely a factor we want to keep down.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

DBSAR
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djozz wrote:
O26Rcr wrote:
How about we let DBSAR continue down the road he has decided to travel with this light? Opinions are fine, (after all, this is one), but he has time, effort, and tangible results to show for his work. Impressive results at that.

Throwing suggestions out for lower power LED’s, or different numbers of them to make it easier for you to mod are kind of a slap in the face to the work he has done already. If you want a particular style of lantern, grab yourself a Q8 and have at it.

I’m quite happy with his intent to use 8 emitters, and having the ability to adjust the temp. If I wasn’t, I wouldn’t be on the list for four of them, (and possibly more before it’s in production).

I do not agree. The suggestions that I give are unrelated to the work that Den has done, his design ideas and field test have been very important for making a great BLF-lantern. But I think I can add genuine good ideas and think it is a chance missed if they have not at least been discussed in this thread.

I think BLF is all about freely and perhaps recklessly posting new ideas and then discuss them. It is how our present modding techniques have been invented and refined, and how the BLF designs take form.

I take everyone’s suggestions & ideas as important as it helps make the project better and more of what everyone want to have in a lantern when possible Smile I have started the cross-section drawing to send to Thorfire and the specification perimeters for them to have a plan start to work on what they can do to make it into production.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

fuzun
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Will this light need pointed batteries?

sbslider
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fuzun wrote:
Will this light need pointed batteries?

If you mean “button top” batteries, the answer is this is prefered. The positive contact is a trace on a circuit board, so the button top would make a sure connection here. I am hoping I can use old laptop pull batteries with the attached connection tabs foormed such that it will simulate a button top, we will see if that works or not.

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djozz wrote:
The Samsung lh351d is not very expensive, at Digikey when ordering a reel it is 1.22 per led (cool white 70 cri, the high cri versions may be a bit more expensive). So 8 leds add up to about $10 worth of leds, I bet Thorfire gets them even cheaper. It is a significant part of production costs so 2warm/2cool may be more economical, but it is not impossible either.

Another option is doing what the whole lighting industry is doing for a good reason: skip the high power leds (which are developed for directed lighting which we are not doing here) and go with a whole bunch of midpower 3030 leds or 5730 leds. Cheaper per lumen, blending is even easier, ledboard is cheap (DTP not needed) and there’s plenty options for tint and high CRI.

Heck, you could use 3000K and 5000K Nichia Optisolis leds and beat everything existing in CRI.

That all sounds pretty reasonable. I’m glad I don’t really have to care what exactly the LEDs are, as long as they perform well enough. Smile

I just made some things a few days ago which used a bunch of cheap LEDs, and it all turned out pretty okay. Granted, soldering on each pixel individually was a bit of a pain, but the overall effect is nice.

Anyway, when we’re farther in the process, send me a prototype and I’ll make it work.

mattlward
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Put me on the list for 1 at this time!

EDC rotation:
FW1A, LH351D 4000k (second favorite)
FW3A, LH351D 3500k
FW3A, SST20 FD2 4000k
FW3A, Nichia 4000k sw40 r9080 (favorite light!)
FW3A, Cree XP-L Hi 5A3
Emisar D4V2, SST20 4000k
S2+, XM-L2 T6 4C

sbslider
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mattlward wrote:
Put me on the list for 1 at this time!

you are now 821 on the interest list

interest list sorted by entry number

interest list sorted by user names

These links are always updated to the latest versions of the lists.

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DBSAR
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ToyKeeper wrote:
djozz wrote:
The Samsung lh351d is not very expensive, at Digikey when ordering a reel it is 1.22 per led (cool white 70 cri, the high cri versions may be a bit more expensive). So 8 leds add up to about $10 worth of leds, I bet Thorfire gets them even cheaper. It is a significant part of production costs so 2warm/2cool may be more economical, but it is not impossible either.

Another option is doing what the whole lighting industry is doing for a good reason: skip the high power leds (which are developed for directed lighting which we are not doing here) and go with a whole bunch of midpower 3030 leds or 5730 leds. Cheaper per lumen, blending is even easier, ledboard is cheap (DTP not needed) and there’s plenty options for tint and high CRI.

Heck, you could use 3000K and 5000K Nichia Optisolis leds and beat everything existing in CRI.

That all sounds pretty reasonable. I’m glad I don’t really have to care what exactly the LEDs are, as long as they perform well enough. Smile

I just made some things a few days ago which used a bunch of cheap LEDs, and it all turned out pretty okay. Granted, soldering on each pixel individually was a bit of a pain, but the overall effect is nice.

Anyway, when we’re farther in the process, send me a prototype and I’ll make it work.

So far the LH351D 4000K High-CRI LEDs are my favorites for a balance of efficiency, tint color, & CRI, Have not tested the 3000K 351Bs yet, but will be when i get to my east cast destination. Also adding a fourth 7135 AMC to the driver to increase output for testing. was curious if Samsung has the LH351D available in 5000K high CRI? (for that tint-blending option.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

BlueSwordM
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They do.

However, the only source I have found of 5000k 90CRI+ emitters in small quantities is Digikey.

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

nquinn
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Is there a reason you don’t want to go to a lower temperature like 3000k? To me if I’m camping I want something close to fire light and as warm as possible.

DBSAR
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nquinn wrote:
Is there a reason you don’t want to go to a lower temperature like 3000k? To me if I’m camping I want something close to fire light and as warm as possible.

Candle/fire tints are around the 2000K range, I had one LED of that tint, but found it’s tint to be very yellow/orange, (close to that of a fire flame) and seemd to be somewhat not very efficient for higher outputs. I have a few Strawhat 5mm LEDs of the 2000K candle tint range that i swapped on some nightlights as they give that candle glow effect, but seems to be to yellow for a brighter lantern. 3000K is what is in the V1 prototype now.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

nquinn
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DBSAR wrote:
nquinn wrote:
Is there a reason you don’t want to go to a lower temperature like 3000k? To me if I’m camping I want something close to fire light and as warm as possible.

Candle/fire tints are around the 2000K range, I had one LED of that tint, but found it’s tint to be very yellow/orange, (close to that of a fire flame) and seemd to be somewhat not very efficient for higher outputs. I have a few Strawhat 5mm LEDs of the 2000K candle tint range that i swapped on some nightlights as they give that candle glow effect, but seems to be to yellow for a brighter lantern. 3000K is what is in the V1 prototype now.

Agree that 2000 would probably be too low. I’d have to see it in person but from the prototypes I kinda like the 3000k over 4000k photo. Totally understand that the 4000k will have more brightness overall though.

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UPDATES: – I will be leaving on June,6th to drive to NovaScotia & Newfoundland. I have the prototype lanterns packed up, with the tools to do LED swaps & testing while there during camping trips. I will also finish the design cross-section drawing for the new lantern to send to Thorfire too there as i will have my laptop with me. Will post the drawings next week here for everyone to have a look at before i submit them to Barry at Thorfire to begin the work to get it rolling Smile

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

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Have a great and safe trip DBSAR! Big Smile Looking forward to the next round of field results.

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DBSAR wrote:
UPDATES: – I will be leaving on June,6th to drive to NovaScotia & Newfoundland. I have the prototype lanterns packed up, with the tools to do LED swaps & testing while there during camping trips. I will also finish the design cross-section drawing for the new lantern to send to Thorfire too there as i will have my laptop with me. Will post the drawings next week here for everyone to have a look at before i submit them to Barry at Thorfire to begin the work to get it rolling Smile

Man, trip after trip. You, Sir, are living the good life. I envy you. Enjoy and have safe trip.

nick91900
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I’m in for 2

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DBSAR wrote:
I have the prototype lanterns packed up, with the tools to do LED swaps & testing while there during camping trips.
Enjoy your trip, and take a few photos of your mobile modding workspace! Thumbs Up
sbslider
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nick91900 wrote:
I’m in for 2

added to the interest list at 822 and 823

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angerdan
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Again USB Type-C:
Memorandum of Understanding on the future common charging solution for smartphones

_USB Type-C™ to be the common charging interface for
other types of portable electronic equipment as mentioned in the Radio Equipment Directive 2014/53/EU (article 3.3a).
In furtherance of this end, signatories agree to gradually transition to the new common charging solution for Smartphones based on USB Type-C._

http://www.digitaleurope.org/DesktopModules/Bring2mind/DMX/Download.aspx...
https://www.heise.de/newsticker/meldung/Einheitliche-USB-C-Ladegeraete-in-der-EU-sollen-kommen-4069422.html

So maybe v2/batch two of the BLF Lantern could be equipped with Type-C port Don’t have to be USB 3.x electronically.
But support for programming with software would be a nice feature.

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It’d be awesome to have a usbasp inside, connected to the MCU for easy reflashing over USB. I don’t think it’ll happen though. Smile

Maybe a later version can use a beefier MCU with USB support built into a bootloader, and reflash directly over USB. That’s not attiny territory though; it’s more something I see on atmega chips.

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USB c sounds good, but I think that a normal micro USB 2A connection will be fast enough for the intended purpose of recharging the lantern with a small solar panel while you are camping. If you need to charge it faster you could still take out the batteries and charge them externally. Also I don’t know if many people would use usb programming because our current firmware seems to be nearly perfect.

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ToyKeeper wrote:
It’d be awesome to have a usbasp inside, connected to the MCU for easy reflashing over USB. I don’t think it’ll happen though. Smile

Cool idea, but considering how few people would use it – I’d say it’s unnecessary cost.
angerdan
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Madtoffel wrote:
USB c sounds good, but I think that a normal micro USB 2A connection will be fast enough for the intended purpose of recharging the lantern with a small solar panel while you are camping. If you need to charge it faster you could still take out the batteries and charge them externally. Also I don’t know if many people would use usb programming because our current firmware seems to be nearly perfect.

It’s just about the physical connector – no need for USB 3.0 protocoll or QC/PD.
And a firmware has no GUI and can’t show at once all settings/options.
severide
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I’m in for one

sbslider
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severide wrote:
I’m in for one

Indeed, I added you as #824 on the interest list.

PocketSammich wrote: I don’t need this, but I want it. Please sign me up.

Polyesterboy
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I’m in.

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