**BLF Ultimate Lantern Project** -Driver design updates Nov,13,2017 (by DEL

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kbear99
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garrybunk wrote:
kbear99 wrote:
I’m also interested in an ultra-cheap down firing diffuser adapter thingy to create a lantern from a standard flashlight.

What about the Solarforce lantern adapter That interest you? BLF review here.

-Garry

Thanks for the suggestion. Looks like a great adapter but a little pricey. I was hoping someone like Den could design something cheap that can be attached to various flashlights around the house during an outage.

DBSAR wrote:
kbear99 wrote:
Den, I’d also like to suggest another project for you and your learned colleagues here. I’m also interested in an ultra-cheap down firing diffuser adapter thingy to create a lantern from a standard flashlight. I’m sure you’ve made things like this for yourself but I haven’t seen anything like this for sale. I’m not suggesting this as a substitute for your original idea — I like the idea of a dedicated lantern that is optimised for such. It would however be great to have a bunch of these adapter thingys around the house for emergency use or whatever.

Already did that one Smile

Which is why you’d be a great candidate to design an ultra cheap universal adapter for mass production. Heck you might even make a buck or two. Just be sure we forum members get a discount Wink

mochaeater
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Great project! I’m in!

Dwantink
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Sounds good as long as it’s not too expensive.

kal444
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Sounds interesting! I am interested.

gicos
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Interested, depending on cost. I’ve been working on a “lid” light for a while, though much less powerful than this (two 18500s). Adafruit makes a stand alone Lith Ion/Li Poly micro USB charge board 3/4” square for 7 bucks. It’ll only push 500ma, but it’s self contained, affordable, available, and made here. Also, should it be of use to you, Nalgene 4 and 8 ounce polycarbonate straight wall jars have Mason threads on them (very close to the diameter you’re working with—2.625” thread OD and 2.52” jar ID). Stainless one piece Mason lids and silicone seals are available from Mason Lifestyle. I’m thinking that riveting a stainless lid to the base plate would be an easy and waterproof way to join the diffuser (if using the Nalgene jar) and body. Even better may be to cut mason threads in the aluminum housing itself and skip the lid, though the two may not work out diameter-wise.

Dirt
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This looks extremely promising. I’ll be in for at least one. If it had usb changing, it would definitely make it more appealing to the non-flash crowd and boost sales and gifting. Very cool, getrdun!!

DBSAR
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Dirt wrote:
This looks extremely promising. I’ll be in for at least one. If it had usb changing, it would definitely make it more appealing to the non-flash crowd and boost sales and gifting. Very cool, getrdun!!

the prototype under construction, though been over busy at work the last few weeks to do much progress on it, but i hope to get it ready by end of April. Smile

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

Kozy
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I’m interested Beer

The Miller
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DBSAR wrote:

the prototype under constriction, though been over busy at work the last few weeks to do much progress on it, but i hope to get it ready by end of April. Smile


Exciting! Just don’t post it April first Wink
DBSAR
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The Miller wrote:
DBSAR wrote:

the prototype under constriction, though been over busy at work the last few weeks to do much progress on it, but i hope to get it ready by end of April. Smile


Exciting! Just don’t post it April first Wink

lol i may stay away from the computer on April 1st

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

gungoat
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I live in the mountains of East Tennessee, and with lots of trees and power lines, its not uncommon for power outages. I once went three days without power. I have a 6000kw generator, but you don’t run that for a light bulb. I’m interested for a few of these when finished. Thanks for all your work!

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I need a new shed light.
I’m in..

"In the land of the blond the one eyed man is king."

*This message is protected with ROT26 encryption.Old Lumens

The Miller
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it is starting to itch to see what is gong on, so if you do have input, please post is, even on April 1st Wink

DBSAR
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More progress updates on the BLF Lantern project in the lower part of the OP on the first page! Smile

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

Cula
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Looking good! Can’t wait to see this this thing light up. Keep up the good work. Could you add dates on your updates? It would be much easier to follow.

DBSAR
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Cula wrote:
Looking good! Can’t wait to see this this thing light up. Keep up the good work. Could you add dates on your updates? It would be much easier to follow.

Good point. Smile i will add dates to the OP.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

The Miller
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Wauw! That build looks amazing!

Dirt
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Nice progress! What kind of price point are you reaching for with this lantern? I can think of about 200 uses for this light.

DBSAR
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Dirt wrote:
Nice progress! What kind of price point are you reaching for with this lantern? I can think of about 200 uses for this light.

The price of a production model will depend on the manufacturer who builds them, the seller, and what Kronos can work out with them once i have the protype completed, tested, and specifications on paper for the design based off this prototype. Smile

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

tenohfive
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Interested depending on final price, will be watching this thread.

djozz
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XP-L 7A3 80 CRI is a nice led for a lantern, I have one of those in my brass CQG 18650 especially for camping.

DBSAR
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djozz wrote:
XP-L 7A3 80 CRI is a nice led for a lantern, I have one of those in my brass CQG 18650 especially for camping.

The 7A3 is my favorite natural warm white tint for lantern use because of its near incandescent light. Its the least glarey of tints i have tested, and gives a candle-like glow on moonlight mode. (there are warmer tints available, but they seem to go to yellow)
my other favorite tint for Lantern use is the XM-L-V3 5D. its a 4000K neutral white with a very slight redish hue, much more pleasing to the eyes than the other 4K tints that have a greening hue.

Other honorable mentions for lantern tints go the 7A4, 8B4, 4C, & 3D (3D being the coolest tint i would ever put in a lantern)

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

DBSAR
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More progress updates on the BLF Lantern project in the lower part of the OP on the first page! now with first Beamshot test photos indoors! / April,3,2016

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

DBSAR
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- and still running on maximum mode. (6.5 hours and counting) I will have to shut it off soon as i can’t stay awake all night to monitor its run time progress. (then restart it tomorrow evening)

I am discovering however the constant running temperature of the XP-L 7A3 on the head at maximum mode has been holding at a constant 44.3 degrees Celsius for the last 6 hours. (running at a constant average of 1.1 amps measured with the three-7135 QLite driver.) ( See IMAGE below:)

- This temperature to an adult hand feels very wrm, ( borderline hot) but if a child touches it may feel to hot) this confirms that with the XP-L it is at its peak running amps versus efficiency for this application, ( remember the head of the lantern is a heavy solid block of aluminum, much bigger than most single 18650 flashlights could ever have) so if a modded driver of higher amperage is used an additional heatsink may be required.
But in this prototype lantern its a good balance of output vs. amps draw vs. heat dissipation for lantern use.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

theoldbill
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Got to love a GB!

Count me in!

electricjelly
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Im getting excited about this project. I love that you will be doing real world testing. I like the faux mantle diffuser.

This is shaping up to be the best led lantern.

xcentric
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really like this idea. IMHO the driver will be interesting – needs firefly/moonlight and multiple other low modes, for long life, and one longish bright mode and something(s) in between. Might be a good candidate for an electronic switch with ramping up and down…..

depending on price, I’m in for at least a couple…..

DBSAR
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xcentric wrote:
really like this idea. IMHO the driver will be interesting – needs firefly/moonlight and multiple other low modes, for long life, and one longish bright mode and something(s) in between. Might be a good candidate for an electronic switch with ramping up and down…..

depending on price, I’m in for at least a couple…..

I am using a driver already with Moonlight/firefly mode. (the Q-lite Rev. of the Nanjq 105c has those modes with 4th star jumped) though in a lantern for moon light it could be a bit lower. ( maybe a custom firmware reprogrammed. I avoided any electronic switches because of several reasons, it reduces modability for the lantern with other drivers, and will add a parasitic drain. ( bad idea for long term storage with cells in it unless the body is unscrewed every time to lock it out. ramping up & down is not ideal either, as its near impossible to determine run times like stepped-mode drivers. any lanterns i have that had ramping i got rid of the ramping modes with new driver swaps.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

xcentric
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DBSAR wrote:
I am using a driver already with Moonlight/firefly mode. (the Q-lite Rev. of the Nanjq 105c has those modes with 4th star jumped) though in a lantern for moon light it could be a bit lower. ( maybe a custom firmware reprogrammed. I avoided any electronic switches because of several reasons, it reduces modability for the lantern with other drivers, and will add a parasitic drain. ( bad idea for long term storage with cells in it unless the body is unscrewed every time to lock it out. ramping up & down is not ideal either, as its near impossible to determine run times like stepped-mode drivers. any lanterns i have that had ramping i got rid of the ramping modes with new driver swaps.

You make a good point about parasitic drain. Less sure about your run-time argument against ramping, as it’s likely to be used over a few nights and many wouldn’t remember how long it had previously been used for, so run times will be somewhat unknown anyway.

I guess my point was that having a lot of flexibility at the low end is critical for this sort of application, whereas at the high output end, there’s less need for such a range of options. Very low is critical, very high less so. Simple to use is also important, as it’s likely to be a ‘family’ lantern….
electricjelly
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DBSAR wrote:
- ( remember the head of the lantern is a heavy solid block of aluminum, much bigger than most single 18650 flashlights could ever have)

Have you considered adding some deep cooling fins in the top piece? This would have two benefits. It would remove weight from the top making it more stable when its set down, and it would increase the passive cooling when left on high for long periods.

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