** BLF LT1M-Mini Project - The little Lantern! **

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** BLF LT1M-Mini Project - The little Lantern! **

- Welcome everyone!

> UPDATE,Feb,12,2020

- Ok all, here is the video explaining how i refined a lantern head for the LT1 Mini and still use the original IF25 LED up-firing configuration, with the original quad-TIR optic still used. I will get the drawing of how it was done completed soon, explaining its principle and how the Mini V1 prototype works. Here i have modified the LT1 Mini with the same LH351 2700K and 5000K 3535 LEDs as used in the full size LT1 lantern. As planned for the production version, it will have the same LT1-Andruil operating firmware as the fullsize LT1, some body design changes, side switch changes, base cap changes to add a removable magnet, (the magnet will help hold a wider accessory base plate for more stability) and add a 18650 sleeve so it can be used with a single 21700 or 18650 cell.

- Members asked for a more compact, backpacking-sized version of the LT1, and we have listened, & will create that Mini-version, like the Mini-GT was created, the LT1 will have a baby variant with nearly the same features. Big Smile
- Here is the new separate build topic for the new planned Sofirn BLF LT1M (LT1-Mini)
Barry & Sofirn sent a couple candidate hosts that i examined & tested as a platform for the LT1M , (an IF25 and SP33) I disassembled both lights, worked with them to see which one would be the best foundation for a mini LT1, and the IF25 was the clear winner. As the IF 25 already has USB-C charging, 21700 support, compact design, AND already has tint ramping with four 3535 LEDs, it is the perfect starting point for the Mini.
So i re-worked the IF25 with the same Samsung LH351 2700K and 5000K LEDs as the LT1 full size, then i spent countless hours of testing every type of shade and globe design, and finally came up with one that works perfectly to create a 360 degree very smooth, even, low-glare light using the IF25’s existing up-firing LED design as used for the flashlight. The LT1-Mini will be much easiwer & simpler to work to get into production than the LT1 was, as the host IF25 already has some good starting points. (the charging, the 21700 format we want, tint ramping etc.
All we need to work on is to get Toykeeper’s LT1 Andruil programmed to this driver, (if the driver needs alterations to accept Andrul maybe Lexel can have a look at that) possibly change the switch LEDs to match and work the same as the full size LT1, and maybe some changes to the LT1M body to ad knurling to match the full size LT1. I will be posting design drawings and photos of how i got the new shade to work so well with an up-firing design soon, and create a video of what went behind the LT1M to get it what i have now as a V1-Mini prototype.
While the high-mode run times may be a bit less than the full size LT1, the plan is to still focus on great run times as much as we an from a 21700 single cell, with the same high CRI 2700K to 5000K tint ramping, Toykeeper’s amazing Andruil-LT1 firmware operating system, a high degree of light transmittance angles, low-glare, USB-C charging, all the best features of the full size LT1 but in a more compact, pocketable, backpacking friendly mini-version.

- Below, is the completed, & tested LT1M-V1 Prototype, along side the full size LT1, and second photo shows how smooth and even the light transmittance is, which is very close to that of the full size LT1. Maximum lumens are average of 350 to 400 lumens output, with that beautiful adjustable High-CRI tints of the sofirn BLF LT1. Thumbs Up

We will begin an interest list as we did with the full size LT1 once we get the new office-set up for the build team, so stay tuned for updates, and a video soon of the birth of the LT1-Mini. Big Smile

BLF LT1-Mini Lantern Project

Edited by: LT1-Mini-Project on 02/12/2020 - 13:52
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BLF LT1-Mini Lantern Project

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Some first designs of the driver
as discussed one with a red channel the other with a Turbo mode

Diameter 25mm with USB-port has resistors to charge directly on a USB-C wall adapter
TP5100 up to 2A fast charging with 5-18V input (not QC or PD, but good for direct connection to 12V solar panels)

RED 3+3+1 AMC

DD WW+3+3

BLF LT1-Mini Lantern Project

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BLF LT1-Mini Lantern Project

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Very nice! I love seeing your prototypes, Den!

I use my LT1 every evening and will definitely buy a couple minis.

Looking forward to more details and the introduction video! Thumbs Up

DBSAR
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goshdogit wrote:
Very nice! I love seeing your prototypes, Den!

I use my LT1 every evening and will definitely buy a couple minis.

Looking forward to more details and the introduction video! Thumbs Up

Thanks for the comments Thumbs Up
As we to get power outages quite often, the LT1 has lit many nights here, and i still use the first production one i received as my main night table light, running on moon or candle mode every night.
This new thread is dedicated to the LT1M Mini, which is the answer to the many wanting a pocket-sized, back-pack sized portable version for camping trips, and even be the little brother/sister to your full size LT1 Lantern. Big Smile

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

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I’ll hold on until micro Cool

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Awesome in for one in 4 years if I survive the pandemic Smile

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DBSAR
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1stein wrote:
I’ll hold on until micro Cool

I will be doing a video soon on some custom built super micro lanterns, even one that can fit in your wallet, emit the same light or more of a candle 360 degrees , & run for 40+ hours.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

1stein
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DBSAR wrote:
1stein wrote:
I’ll hold on until micro Cool

I will be doing a video soon on some custom built super micro lanterns, even one that can fit in your wallet, emit the same light or more of a candle 360 degrees , & run for 40+ hours.

AWESOME. Hope you’ll link it on BLF

DBSAR
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1stein wrote:
DBSAR wrote:
1stein wrote:
I’ll hold on until micro Cool

I will be doing a video soon on some custom built super micro lanterns, even one that can fit in your wallet, emit the same light or more of a candle 360 degrees , & run for 40+ hours.

AWESOME. Hope you’ll link it on BLF

I will, it will be in the main OP of this topic for the LT1 Mini, but will be a separate new topic for the other micro lantern projects.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

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DBSAR wrote:
I will be doing a video soon on some custom built super micro lanterns, even one that can fit in your wallet, emit the same light or more of a candle 360 degrees , & run for 40+ hours.

Woah! Wallet?? Never seen anything like that..

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agent80 wrote:
DBSAR wrote:
I will be doing a video soon on some custom built super micro lanterns, even one that can fit in your wallet, emit the same light or more of a candle 360 degrees , & run for 40+ hours.

Woah! Wallet?? Never seen anything like that..

Yes, sort of. The entire lantern in only 4.5 millimeters thick, uses a very unique remote-phosphor LED (very hard to find) that emits Warm white nearly 360-degrees like an incandescent bulb, can run from a single CR2032 Lithium coin-cell for 12+ hours brighter than a candle, (tested) then run for an additional 30+ hours dimming down to a moon light, but this wallet lantern has two slots for two CR2032 cells in parallel to double those run times, (or save one as a reserve back-up cell after the first is spent.) I have one in my wallet now. the video will reveal this “24+ hour wallet candle” when i create that topic. Big Smile

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

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Driver of IF25 use noticeable PWM.

Could it be possible to transform ltmicro into handheld flashlight? It seems much more actual question than for lt1.

Also for small host it seems good to use main host as heatsink.

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AEDe wrote:
Driver of IF25 use noticeable PWM.

Could it be possible to transform ltmicro into handheld flashlight? It seems much more actual question than for lt1.

we will be developing the LT1M Mini to use non-PWM same as the full size LT1 Lantern.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

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As with the LT I’ll be keeping the interest list for LT1M. Just post your interest in this thread and I’ll add it to the list.

Note that any interest posted in the prior mini LT thread was not captured so post in this thread to get onto the list.

Thanks

9mm/40cal/45cal bullets and large/small pistol primers available for sale in San Francisco Bay area

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SIGShooter wrote:
As with the LT I’ll be keeping the interest list for LT1M. Just post your interest in this thread and I’ll add it to the list.

Note that any interest posted in the prior mini LT thread was not captured so post in this thread to get onto the list.

Thanks

Thumbs Up Big Smile

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

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Interested in 2. Hope they will offer nice colours,

 عُمَانْ

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