*BLF LT1 Lantern Project* (codes going out for more LT1s, second batch shipping!)

10027 posts / 0 new
Last post
twodollarbill
Offline
Last seen: 3 hours 32 min ago
Joined: 01/30/2017 - 11:57
Posts: 43

Looks really good. What are the next steps? Still on Sofirn to produce a prototype?

djozz
djozz's picture
Online
Last seen: 11 min 9 sec ago
Joined: 09/07/2012 - 17:04
Posts: 16169
Location: Amsterdam

Looking good sofar, but I will have a closer look tonight. I like the slightly rotated T in the switch button, just like most of my Q8’s Big Smile

Unloco
Offline
Last seen: 1 hour 2 min ago
Joined: 01/27/2018 - 16:17
Posts: 300

Unloco wrote:
Interested.
Please add me another unit.
DavidEF
DavidEF's picture
Offline
Last seen: 1 week 4 days ago
Joined: 06/05/2014 - 06:00
Posts: 7698
Location: Salisbury, North Carolina, USA

djozz wrote:
Looking good sofar, but I will have a closer look tonight. I like the slightly rotated T in the switch button, just like most of my Q8’s Big Smile

They have to use up those Thorfire buttons! Silly

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

DBSAR
DBSAR's picture
Offline
Last seen: 31 min 29 sec ago
Joined: 02/11/2013 - 23:28
Posts: 6119
Location: Ontario, Canada
twodollarbill wrote:
Looks really good. What are the next steps? Still on Sofirn to produce a prototype?

We are discussing the test-build unit now in the team chat for a test prototype before the production for the first group buy orders are ready.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

djozz
djozz's picture
Online
Last seen: 11 min 9 sec ago
Joined: 09/07/2012 - 17:04
Posts: 16169
Location: Amsterdam

Ok, I had a better look at the design. Some commends:

*the driver section is still pretty massive, and so is the top section. If the coming prototype feels overweight, some grams can be spared by making the driver section leaner here and there, and changing out some of the solid aluminium in the top section for a finned section (vertical fins I think), good for heat dissipation too, and it looks good.

*the light cup seems one piece with the bottom and central tube of it, right? And it will be made of frosted plastic I assume? It would help extracting the light if the central tube plus the bottom of the light cup has a mirror finish, like flashlight reflectors have. But it would become a rather difficult plastic piece like that.

*the way the top is screwed on here, the complete force of the screw is transferred to the plastic cup. Overtightening the screw will crack the cup. This can be improved by inserting a metal (alu) tube of the correct length into the central tube of the light cup, so that the screw tightens the metal tube between top and driver section (the ledboard needs a larger hole in the middle to make room for the tube), while pressing the plastic light cup mildly into the o-rings on top and bottom. That tube can be shiny on the outside if the lightcup itself can not be made reflective there.
I can not see where the led wires go from driver to ledboard, that could interfere with such a metal tube, but it seems to me that a solution can be found for that.

If I come up with more, I will annoy you with that again.

DBSAR
DBSAR's picture
Offline
Last seen: 31 min 29 sec ago
Joined: 02/11/2013 - 23:28
Posts: 6119
Location: Ontario, Canada

djozz wrote:
Ok, I had a better look at the design. Some commends:

*the driver section is still pretty massive, and so is the top section. If the coming prototype feels overweight, some grams can be spared by making the driver section leaner here and there, and changing out some of the solid aluminium in the top section for a finned section (vertical fins I think), good for heat dissipation too, and it looks good.

*the light cup seems one piece with the bottom and central tube of it, right? And it will be made of frosted plastic I assume? It would help extracting the light if the central tube plus the bottom of the light cup has a mirror finish, like flashlighr reflectors have. But it would become a rather difficult plastic piece like that.

*the way the top is screwed on here, the complete force of the screw is transferred to the plastic cup. Overtightening the screw will crack the cup. This can be improved by inserting a metal (alu) tube of the correct length into the central tube of the light cup, so that the screw tightens the metal tube between top and driver section, while clamping the plastic light cup mildly into the o-rings on top and bottom. That tube can be shiny on the outside if the lightcup itself can not be made reflective there.
I can not see where the led wires go from driver to ledboard, that could interfere with such a metal tube, but it seems to me that a solution can be found for that.

If I come up with more, I will annoy you with that again.

As for the mid section its shorten a little from the one i built originally, (also were looking at a version-2 later down the road to add the powerbank feature, that will likely need the extra space and aluminum there for heat dissipation was the thought for having a bit of “beef” left in that area.

- As for the globe/lens part it will be likely a one-piece tougher medium-frosted plastic (like polycarbonate if possible) and the center will be using a white sleeve/cup to cover it and the bottom inside, preferably matte/flat white, and not shiny chrome as i have tested shiny mirror surfaces and all that does is cause sharp eye glare, artifacts in the light distribution and very little to increase light reflection or smooth out the light emitted.

  • As seen in the image below:

for the third question, if the globe/cup is made from polycarbonate, it will be very strong, ( even if Acrylic is used and the walls are made thick it should be strong enough to withstand a good pressure. ( preferable polycarbonate (lexan type material though)

The wire leads will run to the LED MCPCB inside the center tube along side the center bolt.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

sbslider
sbslider's picture
Offline
Last seen: 3 hours 12 min ago
Joined: 01/22/2017 - 13:41
Posts: 1437
Location: United States

djozz wrote:
Ok, I had a better look at the design. Some commends:

If I come up with more, I will annoy you with that again.


keep the critique comments coming . . . Thumbs Up

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

djozz
djozz's picture
Online
Last seen: 11 min 9 sec ago
Joined: 09/07/2012 - 17:04
Posts: 16169
Location: Amsterdam

That sounds good Den, if the cup is from thick polycarbonate it will be immensely strong, it just does not look very thick in the design drawing. The white sleeve sounds like a good solution for getting the light out in the best possible way, you have all the experience about how the beam behaves Smile

AguassissiM
AguassissiM's picture
Online
Last seen: 2 min 35 sec ago
Joined: 12/04/2018 - 19:20
Posts: 171
Location: Canada

Please add one more to the list for me, so total of 2 lanterns at this time.
Thank you.

***Rofis MR70 - just perfect *TurnRaise - Cree XM-L2 ***Catapult V6 - awesome ***BLF Q8 - spring mod
***BLF Mini ***BLF Micro ***Haikelite MT09R ** Convoy C8 ***BLF D80v2 SST40***

DBSAR
DBSAR's picture
Offline
Last seen: 31 min 29 sec ago
Joined: 02/11/2013 - 23:28
Posts: 6119
Location: Ontario, Canada
djozz wrote:
That sounds good Den, if the cup is from thick polycarbonate it will be immensely strong, it just does not look very thick in the design drawing. The white sleeve sounds like a good solution for getting the light out in the best possible way, you have all the experience about how the beam behaves Smile

There is been a lot of trial & error testing over the last couple years with different designs no doubt. But the ideas from all of you helped greatly! if anything else is seen or thought of, please post more. Thumbs Up

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

gotang
Offline
Last seen: 8 hours 43 min ago
Joined: 01/29/2019 - 16:15
Posts: 9

Well, I’ve got to say, I’m actually glad that I heard about this project pretty late into its development, because I’m so excited about it that I’m already starting to get impatient! What amazing work you and the rest of the team have been doing DBSAR – thank you!

I had two small questions though:
-Will there be lanyard holes on the top cap and the tail cap? I couldn’t see any on the CAD, just the metal clip/hanger, but it’d be nice if there was some easy way of attaching paracord as an alternative method to hang the lantern (also ideally being able to do so right-side-up and inverted).
-I’m definitely someone who would have loved to have the powerbank feature, though I totally understand why it’s been dropped from the spec. Hypothetically, were a v2 lantern to be produced that had the powerbank capability added in, would it be possible just to upgrade the v1 to v2 spec by swapping over the driver (and attached daughter boards), or would it be more involved than this?

Once again, thanks for all of your continued efforts – I am seriously looking forward to seeing the outcome of this one!

AdmiralShyGuy
Offline
Last seen: 2 weeks 4 days ago
Joined: 03/02/2019 - 08:50
Posts: 1
Location: PA

This looks interesting. Please add me to the list.

The_Driver
The_Driver's picture
Offline
Last seen: 11 hours 59 min ago
Joined: 10/20/2016 - 05:51
Posts: 1428
Location: Germany

Looks good.
In my eyes acrylic is a bad idea though. It tends to crack even under slight pressure.

DBSAR
DBSAR's picture
Offline
Last seen: 31 min 29 sec ago
Joined: 02/11/2013 - 23:28
Posts: 6119
Location: Ontario, Canada

gotang wrote:
Well, I’ve got to say, I’m actually glad that I heard about this project pretty late into its development, because I’m so excited about it that I’m already starting to get impatient! What amazing work you and the rest of the team have been doing DBSAR – thank you!

I had two small questions though:
-Will there be lanyard holes on the top cap and the tail cap? I couldn’t see any on the CAD, just the metal clip/hanger, but it’d be nice if there was some easy way of attaching paracord as an alternative method to hang the lantern (also ideally being able to do so right-side-up and inverted).
-I’m definitely someone who would have loved to have the powerbank feature, though I totally understand why it’s been dropped from the spec. Hypothetically, were a v2 lantern to be produced that had the powerbank capability added in, would it be possible just to upgrade the v1 to v2 spec by swapping over the driver (and attached daughter boards), or would it be more involved than this?

Once again, thanks for all of your continued efforts – I am seriously looking forward to seeing the outcome of this one!

We do hope to do a slight mod to the head to allow the bail handle to be replaced by paracord lanyard by the user. ( possibly with a through angled hole there the bail handle is to the top.

As for the USB power bang option, its unsure if it can be done as a retro-fit option later, it will depend on how the PCB board is produced and the plug port. (its its a USB-C type then its possible to use the same port)

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

DBSAR
DBSAR's picture
Offline
Last seen: 31 min 29 sec ago
Joined: 02/11/2013 - 23:28
Posts: 6119
Location: Ontario, Canada
The_Driver wrote:
Looks good. In my eyes acrylic is a bad idea though. It tends to crack even under slight pressure.

Were hoping to see if it possible to have it made from a more durable material like polycarbonate (similar to lexan used in safety glasses)

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

SIGShooter
SIGShooter's picture
Offline
Last seen: 1 hour 4 min ago
Joined: 07/14/2013 - 02:10
Posts: 1792
Location: northern california

The_Driver wrote:
Looks good.
In my eyes acrylic is a bad idea though. It tends to crack even under slight pressure.

Doesn’t that depend on the acrylic and design? I have a 125 gallon fish tank that’s been up and running for 30 years and it’s certainly under lots of pressure.

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

twisted raven
Offline
Last seen: 39 min 7 sec ago
Joined: 03/13/2016 - 11:10
Posts: 485
Location: texas

Acrylic is softer and more pliable than glass. It should be less prone to cracking than glass. Polycarbonate is ideal, but dunno how that would affect pricing.

DBSAR
DBSAR's picture
Offline
Last seen: 31 min 29 sec ago
Joined: 02/11/2013 - 23:28
Posts: 6119
Location: Ontario, Canada
SIGShooter wrote:
The_Driver wrote:
Looks good. In my eyes acrylic is a bad idea though. It tends to crack even under slight pressure.
Doesn’t that depend on the acrylic and design? I have a 125 gallon fish tank that’s been up and running for 30 years and it’s certainly under lots of pressure.

If the side wall thickness of the globe/lens can be at least 2.5 to 3 mm thick, acrylic would be strong enough. (for example i used an acrylic storage cup that has a wall thickness of 2.5 millimeters, (roughly 1/8” thick) on the original V1 Lantern build, and that lantern has been used & abused, dropped, knocked over, & dragged on wilderness trips for a couple years and it has not cracked yet. (Just has a couple scratches & nicks from wear & tear. Though it would be preferable if polycarbonate can be used as that material is more scratch resistant & stronger, but if we have to go with acrylic for cost reasons and its thick enough then it will be ok.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

joechina
Offline
Last seen: 6 hours 3 min ago
Joined: 03/05/2016 - 08:23
Posts: 1439
Location: Germany

Has someone a link to the final lantern logo?

DBSAR
DBSAR's picture
Offline
Last seen: 31 min 29 sec ago
Joined: 02/11/2013 - 23:28
Posts: 6119
Location: Ontario, Canada
joechina wrote:
Has someone a link to the final lantern logo?

The one that was originally finalized below:

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

joechina
Offline
Last seen: 6 hours 3 min ago
Joined: 03/05/2016 - 08:23
Posts: 1439
Location: Germany

Thank you! Thumbs Up
I think its missing in post one Smile

DBSAR
DBSAR's picture
Offline
Last seen: 31 min 29 sec ago
Joined: 02/11/2013 - 23:28
Posts: 6119
Location: Ontario, Canada
joechina wrote:
Thank you! Thumbs Up I think its missing in post one Smile

Thanks for reminding me. Big Smile will add it.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

Ilumenati
Ilumenati's picture
Offline
Last seen: 3 hours 13 min ago
Joined: 01/07/2019 - 05:22
Posts: 80
Location: Pac NW

OK, I’ve been thinking about the multi-day power outages we frequently have, better put me down for a second one.

My first one is: 1232 Ilumenati

Thanks,

peteybaby
peteybaby's picture
Online
Last seen: 3 min 11 sec ago
Joined: 01/06/2011 - 01:17
Posts: 539
Location: North Vancouver, Canada

Can I be added to the list too please?

SwissFlashy
Offline
Last seen: 11 hours 40 min ago
Joined: 01/19/2019 - 06:11
Posts: 33
Location: Central Europe

@DBSAR Do you know if USB-C will definitely be used?

chathamh
Offline
Last seen: 1 week 4 days ago
Joined: 01/11/2019 - 10:10
Posts: 5
Location: Kansas

I’ll take a second one as well (Currently #1175). This build continues to exceed my expectations.

scdaf
Offline
Last seen: 1 day 6 hours ago
Joined: 11/01/2011 - 18:52
Posts: 328
Location: United States

I’m 195 on the list. Please add me for one more and thanks for the endless work this has required so far!

DBSAR
DBSAR's picture
Offline
Last seen: 31 min 29 sec ago
Joined: 02/11/2013 - 23:28
Posts: 6119
Location: Ontario, Canada
SwissFlashy wrote:
@DBSAR Do you know if USB-C will definitely be used?

Were hoping the port will use a USB-C interface if it don’t drive up the cost to much.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

SIGShooter
SIGShooter's picture
Offline
Last seen: 1 hour 4 min ago
Joined: 07/14/2013 - 02:10
Posts: 1792
Location: northern california

New additions added since 2/24:

1257 Sonofspectrum
1258 Chasealmighty
1259 PickleFuzz
1260 Marc E
1261 el_duderino
1262 teejay
1263 f0xx
1264 f0xx
1265 New_Moon
1266 New_Moon
1267 niktak11
1268 beastlykings
1269 Brinkmann
1270 DBSS
1271 MJLiptak
1272 peteybaby
1273 The_Driver
1274 The_Driver
1275 baldo21
1276 baldo21
1277 Unloco
1278 AguassissiM
1279 AdmiralShyGuy
1280 Ilumenati
1281 peteybaby
1282 chathamh
1283 scdaf

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

Pages