*BLF LT1 Lantern Project) (updated Nov,17,2020)

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hcanning
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I think it’s about time I invested in one of these. Is BG currently the cheapest place to get one?

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SwissFlashy
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@Sofirn or anybody else: Do you know when Version 5.0 will be available again on sofirnlight.com?

iamlucky13
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hcanning wrote:
I think it’s about time I invested in one of these. Is BG currently the cheapest place to get one?

I’m not sure what coupon codes might be available for Banggood, but generally Sofirn’s Aliexpress page is the cheapest place.

SwissFlashy
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Is the BLF LT1 designed to be powered by USB-C without the battery cage 24/7? I would like to use it as a nightlight which should run the whole evening/night/morning on 300-400 lumens. Would be a shame if it dies after some weeks/months.

DBSAR
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SwissFlashy wrote:
Is the BLF LT1 designed to be powered by USB-C without the battery cage 24/7? I would like to use it as a nightlight which should run the whole evening/night/morning on 300-400 lumens. Would be a shame if it dies after some weeks/months.

It can run continuously from the USB port (no batteries) from a wall charger or power supply, but i recommend on lower modes only, 150 lumens or less) so it don’t over heat the driver/charging circuits from long tern running.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

djsz
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So I just got back from several days in the woods with 2 LT1s (put to their first test), and they performed so beautifully – the warm glow coming from our rustic cabin made it look like we had electricity and had intentionally created ambiance with lamps! 4 nights and the batteries are still at 3.9v. The true testament is when my wife, completely unprompted, remarked, “those lanterns are amazing – where did you get them? They’re just really well made.” Very well done, everyone!

Sillen
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Banggood have a flash sale, AUD73.07 cheaper than the group buy last year due to FX variation Big Smile

Can’t justify a third Sad

DBSAR
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djsz wrote:
So I just got back from several days in the woods with 2 LT1s (put to their first test), and they performed so beautifully – the warm glow coming from our rustic cabin made it look like we had electricity and had intentionally created ambiance with lamps! 4 nights and the batteries are still at 3.9v. The true testament is when my wife, completely unprompted, remarked, “those lanterns are amazing – where did you get them? They’re just really well made.” Very well done, everyone!
Thumbs Up Big Smile

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

justanotherguy
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Colors… I want colors

SIGShooter
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justanotherguy wrote:
Colors… I want colors
Sofirn said that a new batch of LTs are coming soon in green, orange, and desert tan. In addition 200pcs will have USB-C output functionality (not sure what colors for these).
Dutcheee
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Sounds nice, can I reserve a desert tan with powerbank function? LOL

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Dutcheee wrote:
Sounds nice, can I reserve a desert tan with powerbank function? LOL
You might want to PM the BLF Sofirn rep to see if that’s possible to do. All that was mentioned was that they’re coming soon but didn’t mention price or where they would be sold from.
Sofirn
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SwissFlashy wrote:
@Sofirn or anybody else: Do you know when Version 5.0 will be available again on sofirnlight.com?

Yes. It will be available again soon.
Coscar
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Considering previous timelines, I cant help but wonder if “Soon” means the same thing in Chinese as it does in English.,,,, I guess we will know ‘sometime’ in the future.

Im not a Pessimist …. just an Optimist with a lot of experience


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cm64
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Coscar wrote:
Considering previous timelines, I cant help but wonder if “Soon” means the same thing in Chinese as it does in English.,,,, I guess we will know ‘sometime’ in the future.

LOL on par with Chinese lumens ?

alex64
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I have seen in the latest users photos of Aliexpress that the newest LT1 come without any pads connected. Has anything changed? Maybe now the solder it’s inside?

Phlogiston
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The newest LT1 uses 0Ω resistors instead of solder blobs, because that allows automated manufacture instead of manual soldering, which helps Sofirn’s quality control.

If you look very closely at the image, you’ll see four tiny resistors, two labelled R_AMC4 and two labelled R_AMC5. Those are the ones. There’s one of each on the WW side, and one of each on the NW side.

The solder pads were left to give people flexibility in changing the maximum brightness of their lanterns. If you desolder the resistors to reduce brightness and increase runtime, but change your mind, you can increase the brightness again by soldering the pads and save yourself messing about putting the resistors back.

alex64
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Thanks for the explanation. If I understand correctly the pads 4 and 5 are connected with two resistors and the pads 6 and 7 are not. So if I want to unlock all the power I just have to solder the pads 6 and 7 like I did in the old version.

Phlogiston
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Yes, that’s right.

alex64
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Many thanks Thumbs Up

Chatika vas Paus
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Sofirn I signed up for a group buy for two, but bought one. Will I be able to get a discount on the new version?

Lightenzaza
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Chatika vas Paus wrote:
Sofirn I signed up for a group buy for two, but bought one. Will I be able to get a discount on the new version?

Don’t you think it’s too much overhead to maintain the quantity used by each signators ? Much simpler, Sofirn is giving discount codes regularly openly or through a PM . I was late to the party but i got the same price .

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stagger
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DBSAR wrote:
Serifus wrote:
How long until there is lt1 maxx using 4×21700’s because i think it would be lolsy to have a lantern with 20ah battery life

that cell format may be possible for the LT2 ( Deluxe) version planned, that will have the power bank option. a 20ah power bank/lantern has some real benefits for run times and charging capacity. Thumbs Up

+1 on this. I’m holding out until a 4×21700 model is released.

Nooner
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Forgive me if this has been asked.

Is there a plan to have the 18650 version have power bank functionality?

MtnDon
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My question is whether or not there anything concrete about a version 2 of any kind or is this all simply theoretical; a wishlist?

iamlucky13
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Nooner wrote:
Forgive me if this has been asked.

Is there a plan to have the 18650 version have power bank functionality?

Nothing concrete at this time, but everyone is aware it is a frequently requested feature. DBSAR and Lexel have both needed (and very much deserve) some time off from projects like the lantern, so I would not count on any updates in the immediate feature.

madcrow
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SIGShooter wrote:
In addition 200pcs will have USB-C output functionality (not sure what colors for these).

Wow, that’s awesome!!! Can you share any details about the implementation? If not, I hope @Lexel can, I assume this is also his design.
E.g. will they support USB-C PD (quick charging, with multiple output voltage levels), or just a standard 5V/3A output?
Will the same, single type-c connector be used for power input and output (i.e. type-c dual-role-power, DRP)?
Will the charging controller (TP5100) remain the same in this revision, or will it be replaced, maybe with a fully integrated powerbank controller IC?
Can the light and the power output features be used simultaneously?

idahofarmer
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Just got 2 lights. Using both off grid 4hrs per night on medium. Voltage drops .1v each night. Should get 10-12 nights runtime. Such awesome lights. Have told friends to buy them.

Question……

1. Can a 3/4 second delay be put on start so that when clicking functions it doesnt flash light in face? During 3/4 second delay if second click is inputted it cancels out white flash.

2. Can battery meter be moved to orange button?

3. Can one warm led be replaced with red and 3rd flash during warm tint ramp function setup activates the 1 red led at 1 lumen?

SIGShooter
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madcrow wrote:
SIGShooter wrote:
In addition 200pcs will have USB-C output functionality (not sure what colors for these).

Wow, that’s awesome!!! Can you share any details about the implementation? If not, I hope @Lexel can, I assume this is also his design.
E.g. will they support USB-C PD (quick charging, with multiple output voltage levels), or just a standard 5V/3A output?
Will the same, single type-c connector be used for power input and output (i.e. type-c dual-role-power, DRP)?
Will the charging controller (TP5100) remain the same in this revision, or will it be replaced, maybe with a fully integrated powerbank controller IC?
Can the light and the power output features be used simultaneously?


That’s all that Sofirn mentioned in a group chat Sad

Hopefully they’ll shed more details on things soon.

ToyKeeper
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idahofarmer wrote:
Just got 2 lights. Using both off grid 4hrs per night on medium. Voltage drops .1v each night. Should get 10-12 nights runtime. Such awesome lights. Have told friends to buy them.

Question……

1. Can a 3/4 second delay be put on start so that when clicking functions it doesnt flash light in face? During 3/4 second delay if second click is inputted it cancels out white flash.

2. Can battery meter be moved to orange button?

3. Can one warm led be replaced with red and 3rd flash during warm tint ramp function setup activates the 1 red led at 1 lumen?

1. There is a compile-time option to change the response timing while turning the light on. The driver is pretty easy to reflash with a SOIC8 clip or one of Lexel’s pogo pin adapters. So… no, that isn’t going to be implemented in the official firmware, but yes, you can probably modify your LT1 to make it behave as described.

Specifically, in the config file, change B_TIMING_ON from B_RELEASE_T (the default) to B_TIMEOUT_T. This tells it to wait until all clicks have resolved before it responds. Nobody I’m aware of uses this option though, so it hasn’t received much testing or maintenance. It may need to be updated to make sure it still works.

2. The firmware has support for indicating battery status with RGB LEDs in the button… however, the LT1 doesn’t have RGB LEDs or enough pins on the control chip to handle something like that. So it would require pretty big hardware changes.

As an alternative, it should be possible to modify the battery check mode so it would only blink the button LEDs and not the main LEDs. But this is not currently implemented, so it would require modifying some code.

3. There has been some talk about adding a third power channel for red LEDs, and adding a set of red LEDs plus the driver hardware to power them. It would be reasonably straightforward to add to the firmware, too. But I haven’t heard any confirmation about it actually happening.

The LT1 itself doesn’t have the hardware necessary; it would require Sofirn to change the design and manufacture new parts.

So it’s a “maybe” for a later version (LT2?), and a “definitely not” for the current version (LT1).

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