ArmyTek        
Page 3 of 3 FirstFirst 123
Results 61 to 86 of 86

Thread: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

  1. #61

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Hi all,

    This post has to do with sharing some info regarding the developing of long wanting new type of lighting element.


    Goals were:

    1*easier to make
    2*lower profile for use to tiny lanterns also
    3*more compact lighting element with 5 high power LEDs for creating a light emitting spot rather area.
    4*Higher achievable output as much as 1000 lumens
    5*Can be replaced

    Leds used for this new lighting element approach are seoul's semiconductors SZ5-M1-WW-C8-V1V2-HA 80CRI min, 2700K
    data and datasheet: http://www.mouser.com/ProductDetail/...%252bvPw%3D%3D

    **
    Despite my efforts, different heatsinks used and interfaces between heatsink and lighting element (pentahedron) goal 4 was not achieved. Actually there is only a marginal improvement in heatsinking than old element whereas the old one was limited to 3.5-4w of heat dissipation the new one goes 4-4.5 watts.

    I have replaced the custom brass heatsink with a quite large copper sheet than presents an very small thermal resistance (big heatsinking ability) and found out that the systems thermal resistance marginally imrpoves. Major thermal resisstance comes from the very construction of the pentahedron.. Temporarily i am out of ideas.. perhaps a more heat conductive solder...
    So as it stands now, new lighting elements can deliver top 500 (4.3w power dissipation) lumens reaching some 95 degrees celcius at LEDs at that power level with an ambient 25 degrees celcius temp.

    Extensive temp measurements were taken to conclude those.
    when attemping to over power the new lighting element above 5w input, then thermal runaway is a major concern that leads to further input power that surely in the long term will damage the leds.


    **
    Beside all these obstacles and limitations, IMO, the new element is undeniably an improvement.

    http://s1358.photobucket.com/user/ba...eshow/9-6-2015
    or
    http://s1358.photobucket.com/user/ba...brary/9-6-2015

    **

    your comments are welcomed

    cheers,
    barou

  2. #62

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    those days found me in my workshop finalizing and test running now, 2 of my new teched lanterns, having λ-series circutry and all other features as screwable bottom lid, removable potentiometer in wick turret, new slim and more powerful lighting element.

    Get a preview, for your eyes only.

    Models are Frowo 500 (black hot blast lantern)


    Metaloglobus 104E (cherry red cold blast type lantern)




    more pics http://s1358.photobucket.com/user/ba...show/23-6-2015

    note: imperfections as paint scrathes will be address at the finilizing stage.


    cheers,
    Barou

  3. #63
    Flashaholic* Poppy's Avatar
    Join Date
    Dec 2012
    Location
    Northern New Jersey
    Posts
    4,537

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Quote Originally Posted by Baroutologos View Post
    Hi all,

    This post has to do with sharing some info regarding the developing of long wanting new type of lighting element.


    Goals were:


    **
    Despite my efforts, different heatsinks used and interfaces between heatsink and lighting element (pentahedron) goal 4 was not achieved. Actually there is only a marginal improvement in heatsinking than old element whereas the old one was limited to 3.5-4w of heat dissipation the new one goes 4-4.5 watts.

    I have replaced the custom brass heatsink with a quite large copper sheet than presents an very small thermal resistance (big heatsinking ability) and found out that the systems thermal resistance marginally improves. Major thermal resistance comes from the very construction of the pentahedron.. Temporarily i am out of ideas.. perhaps a more heat conductive solder...
    So as it stands now, new lighting elements can deliver top 500 (4.3w power dissipation) lumens reaching some 95 degrees celcius at LEDs at that power level with an ambient 25 degrees celcius temp.


    your comments are welcomed

    cheers,
    barou
    Barou,
    Perhaps if you OPEN the TOP, and the BOTTOM of the pentahedron, so that air may circulate due to convection, I don't know if that would help, but it is a thought.
    Another is to have another copper heat sink at the top, similar to the one on the bottom.

    Maybe a finned heatsink? Aren't there some cylindrical finned CPU heat sinks?
    My Grand Kids call me Poppy

  4. #64
    Flashaholic* RI Chevy's Avatar
    Join Date
    Aug 2011
    Location
    Ocean State
    Posts
    3,600

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Very nice light coming from that lantern!

  5. #65

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Quote Originally Posted by Poppy View Post
    Barou,
    Perhaps if you OPEN the TOP, and the BOTTOM of the pentahedron, so that air may circulate due to convection, I don't know if that would help, but it is a thought.
    Another is to have another copper heat sink at the top, similar to the one on the bottom.

    Maybe a finned heatsink? Aren't there some cylindrical finned CPU heat sinks?
    Hello poppy,

    Actually the top of the pentahedron is open with an 3mm hole some as the bottom. It is not shown so clearly in the picture but the sides of the pentahedron are not that hermetically sealed together.

    I have not any photo handy right now, but i started with a star type finned heatsink for leds. I also try other things. Nah.. it is not pretty. Especially in small and medium sized lanterns where distance between glass and heatsink is small, the finned heatsink does not look so cool. Let aside their geometries, produce thicker or not so thicker shadows.
    What i am saying is next to impossible to get what i really want except make it. (brass is cool also)

    ***

    Bear in mind that i have soldered for experimentation the pentahedron in a extra large copper sheet (large heatsink). Leds are cooled only a bit more and not substantially.
    Its about pentahedron's very structure that must be altered in order to attain higher power outputs.

    ***

    Anyway, it does a goood job for power about 4-5 watts. (450-550 lumens) and it seems good as a top limit, at least for now


    cheers

  6. #66

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    The past days strived to assemble a highly collectable chassis Feuerhand 176 WWII era lantern, retrofitted per λ-series specs.
    It took me almost three days to make it work as it should.

    Finally, it worthed the fuss.
    take a peek


    more photos
    http://s1358.photobucket.com/user/ba...show/25-6-2015
    Last edited by Baroutologos; 06-25-2015 at 02:17 PM.

  7. #67
    Flashaholic* Poppy's Avatar
    Join Date
    Dec 2012
    Location
    Northern New Jersey
    Posts
    4,537

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Quote Originally Posted by Baroutologos View Post

    ***

    Anyway, it does a goood job for power about 4-5 watts. (450-550 lumens) and it seems good as a top limit, at least for now


    cheers
    Barou,
    Most, or at least many LED lanterns top out in the 300-400 lumen range, and there must be a reason for that. One is that at that level of output, they produce too much glare. So while it may be possible to create a lantern that can output 1000 lumens, it may not be all that desirable. You are doing nice work, and your last piece looks nice too!
    My Grand Kids call me Poppy

  8. #68

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    hey poppy, i think you are absolute right. Despite my inability at the moment to reach 1000lumens without damaging leds, a handheld lantern in the absence of ambient light above 300-400 lumens makes glaring problems.
    Its my firm belief that higher power output should be acompanied by a reflector that will allow lantern to be hanged above eye line of sight and push lots of light below without glaring anyone.

    cheers,
    Last edited by Baroutologos; 07-03-2015 at 05:26 AM.

  9. #69

    Default first Reflector Lantern

    i have been busy lately (time allowing) at finilizing my long worked λ-series lanterns.
    This post is about my first lantern that came with a reflector (hood).

    Take a look of a hooded lantern




    slideshow http://s1358.photobucket.com/user/ba...eshow/6-7-2015


    ***
    For artistic shake, i let lantern unfinished, actually it is tinned and the tin has tarnished from places to places but still holds ok cocnerning rust protection.
    The hood on the other hand was in a rather poor condition of rust.
    Required, derusting andsurface preparing. Actually i applied on this, the black oxide process, thus "painting it" black on the outsidewithout changing its dimensions since clearances are really tight.

    That reflector is rather small around 20 cm diam and was made for cosmetic reasons rather real reflecting job. Hence it was painted black inside and outside.
    Inside surface now is iron polished and laquered so as to not rust and reflect light, and outside laquered black oxide.

    This BAT158 lantern has its red led also removed from usual position, perpedicular so as to light the dimmer/on-off switch.


    cheers,
    Barou

  10. #70
    Flashaholic* RI Chevy's Avatar
    Join Date
    Aug 2011
    Location
    Ocean State
    Posts
    3,600

    Default Re: first Reflector Lantern

    Awesome looking lantern with the bonnet.

  11. #71

    Default Re: first Reflector Lantern

    thank you for your support

  12. #72
    Flashaholic* FRITZHID's Avatar
    Join Date
    Jun 2011
    Location
    Icelandic wastelands of Monico, WI
    Posts
    2,499

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    I have several LED converted lanterns and the glare is tough to deal with. One way I was thinking of combating this is employing the use of a retractable Mylar reflector. It could be wound around a thin spool and pulled over ˝ of the lens when needed, reflecting light forward while keeping the user glare free, then rewound when 360° light is desired.
    I Got tired of looking for the light at the end of the tunnel so i lit that bitch up myself! Convoy s2 365nm, Maxa-Beam Gen II, 55w hid/100w incan Vector Twin, Amondotech n30, vss-3A, Reylight Ti Lan v3, Helius Sigma 9, astrolux s41 219, Shadow JM35, BLF GT,

  13. #73

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Hello FRITZHID,

    Nice to have you here.
    Yea, glare is always an issue for a lantern. I feel that i should mention few properties of glare.

    * The darker the surroundings for any given lighting source, the more glaring it seems.
    * The more bright generally and naturally, a lighting source is the glariest is
    * The more light concetration has a lighting source per emmiting surface, the glariest is

    As a method for combating the issue, as is known , i always frost the globes with special vitro paint.


    If at high, the lighting source becomes ""blurred" to an intense-light-ball sized about a small light bulb, whereas the rest of surface of glass globe has the brightness diminishing as move away from centre.
    Personally, i consider it is good enough for an output of 300-500 lumens even in the darker surroundings. Its a matter of personal preference though.


    ***
    Regarding the clever trick for redirecting light forward when the lantern is used for walking around..
    I have seen something similar in the past, e.g a lantern with a bull eye.That is a lense embeded to the glass globe or used as an add on to redirect light forward, but still glaring user behind.


    I have some ideas regarding switching modes between lets say 100-140 degrees light redirection and common 360 degree wide area illumination, but still far from it.

    cheers,
    Barou

  14. #74
    Flashaholic* Poppy's Avatar
    Join Date
    Dec 2012
    Location
    Northern New Jersey
    Posts
    4,537

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Quote Originally Posted by FRITZHID View Post
    I have several LED converted lanterns and the glare is tough to deal with. One way I was thinking of combating this is employing the use of a retractable Mylar reflector. It could be wound around a thin spool and pulled over ˝ of the lens when needed, reflecting light forward while keeping the user glare free, then rewound when 360° light is desired.
    Fritz, that is pretty clever
    If the spool is held vertically, then the shield/reflector can be wrapped around the lens of the lantern and the user can vary the number of degrees that are shielded, anywhere from 1 to perhaps 180 degrees.

    Barou,
    That is a really cool looking cyclops of a lantern you have there.
    My Grand Kids call me Poppy

  15. #75
    Flashaholic* FRITZHID's Avatar
    Join Date
    Jun 2011
    Location
    Icelandic wastelands of Monico, WI
    Posts
    2,499

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Quote Originally Posted by Poppy View Post
    Fritz, that is pretty clever
    If the spool is held vertically, then the shield/reflector can be wrapped around the lens of the lantern and the user can vary the number of degrees that are shielded, anywhere from 1 to perhaps 180°
    That was my exact thinking! :-D
    I Got tired of looking for the light at the end of the tunnel so i lit that bitch up myself! Convoy s2 365nm, Maxa-Beam Gen II, 55w hid/100w incan Vector Twin, Amondotech n30, vss-3A, Reylight Ti Lan v3, Helius Sigma 9, astrolux s41 219, Shadow JM35, BLF GT,

  16. #76

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Today i am going present two new vids.

    Camping lantern

    The first video is about having the lantern working as a camping lantern drawing power from a RV or Photovoltaic/Battery installation or any external dc power source as long as incoming voltage is 4-18volts. (note above 7volts cells are not charging)

    https://www.youtube.com/watch?v=lVgWJkF_bHM

    Polarity protection is also there.


    Water resistance


    I had seriously understimated my new lanterns series, resistance to water.
    Below is a vid that will demonstrated lanterns ability to withstand serious moisture, survive and operate in the same time.

    Note, i am not claiming indefinite water proofness rather resistance, since prolong exposure to water, will find its way for damaging cells, circuitry, potentiometer and the very chassis of the lantern.

    see
    https://www.youtube.com/watch?v=XRyvUAT_eOE
    this video has english subs


    comments welcomed,

    cheers

  17. #77

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Blog updated and interactive image map in the tech section included (hover mouse over action and clickable images)
    No working so far on cell phones.

    This way in a glance you get an idea of what a lantern of mine is about
    http://www.rechargeable-led-lantern.com/barous-tech/

  18. #78

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Poppy, a well known cpf member has repeatedly said that lanterns have some limitations. I quote "Lanterns are good for outdoor use.. the problems with lanterns is that they produce a glaring light"

    ***

    I have made so many efforts in order to make the antique upcycled lanterns, apart of items of beuty and nostalgia to be of actual use, robust and versatile in power input terms as well as parts replacement.

    What always eluded me was.. a reflector. Some lanterns i aquire have their original reflectors and this is great. For some others, a reflector can be procured at shops as kirkman lanterns or similar.
    But for the majority of retrofited lanterns i make no reflector matches that is commercial available.

    So, with patience and through trial and error, i can proudly present before thee, my versions of reflectors.

    see them here.

    ***



    In the above photo, the black reflector, is a facory made, orginal GDR BAT 158 reflector. This is purely cosmetic end had both its surfaces painted black.
    In any version of the lantern, color or tin , the reflector i had is black both ways.

    Next to it, lie two generic versions of my reflectors, one that fits lanterns and secures into place with fasteners and the other with "legs".
    Both have their merits and draw backs but in respect to their functionality, they are both equal. Let aside that are generic type and fits BAT158, Feuerhand 275, Metaloglobus 104E etc

    They are constructed in two halves that are joined with M2.5 screws together. This way i can shipp them folded with no added cost and economy of space.

    ***
    I have made also reflectors for hotblast lantern models.
    I intend to make them a staple item and each lantern i sell to have its reflector.


    ***
    why reflector?

    Reflector's functionality, aside for being more cool in my oppion
    • allows lantern to be hunged overhead, avoiding the line of sight to be at the level of light source, thus blinding and "wasting lumens" in subjective perceived lighted area.
    • redirected lights downwards eliminating lanterns tank's shawdow.
    • redirected lightt downward is especially usefull to when walking with lantern (not blinding) and in outdoor situations that light that goes to sky is lost light.


    Last edited by Baroutologos; 12-05-2015 at 05:04 PM.

  19. #79
    Flashaholic* Poppy's Avatar
    Join Date
    Dec 2012
    Location
    Northern New Jersey
    Posts
    4,537

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Barou,
    The addition of a reflector/shield is a nice touch.

    Last year, while fooling with various diffuser shapes. I discovered that the color of the reflector made a difference in the color/tint of the reflected light. I was working with cool white emitters, and found that I preferred natural wood to a pure white, or shiny metal, reflector. It probably isn't as efficient, but looks nicer/ was gentler on the eyes.
    My Grand Kids call me Poppy

  20. #80

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Hello Poppy,

    Yes you have absulutely right. I have made so far, stainless steel mirror like reflectors to polished iron. I prefer tha later personally. Glaring reflectors imho is the last thing i want.

    cheers,
    Barou

    ps: yes, reflector tint surely will affect overall light color emmited

  21. #81

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    In continuance of the reflector /shade issue,
    this is how is finilized a less reflective approach.



    and



    more photos at http://s1358.photobucket.com/user/ba...show/12-2-2016

    ***


    The particular reflector was sand blasted both sides. Coarse blasting on the exterior, polishing blasting on the interior. Both sides laquered. It provides a gentle reflecting surface even spreading the reflected light.


    cheers,
    Barou

  22. #82
    Flashaholic* RI Chevy's Avatar
    Join Date
    Aug 2011
    Location
    Ocean State
    Posts
    3,600

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Real nice design.

  23. #83

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    Hello,

    its have been some time since my last post in here regarding my lantern's tech. Although all time i rearrange things and make edition upon edition of every single aspect in lantern making, past easter i made an interesting upgrade.

    I was thinking about making an alkaline batteries run, low power (max 1 watt) led lantern. I was in the process of visualizing the circuitry and other things too, and i realized screwed bottom style lid that i currently employ in 18650 cells (that are inserted once and forget them) will be a great setback to an alkaline cell lantern that needs to open the lid and secure it again in an instance.

    An image equals a thousand words..








    video: https://youtu.be/EtKaW5tyrYo


    cheers,
    Barou

  24. #84

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    just before my summer holidays start, i had to make two lanterns. One for me and one for an uncle of mine.
    in this post i will present my lantern to all fellow lantern enthusiasts.

    First consideration was the chassis. My very first lantern as a child was a BAT 158. I could not go otherwise, let aside it is the one of the smaller chassis around.
    Also, i had the luck to outbid a crowd or better to give a lot of money to get a bunch of original, embossed "BAT is the Brightest Made in Germany" small globes that i have not seen before in my long engagement in lantern making.

    Then i had to have an original reflector. I got one. last i had to choose the finishing.. I was tortured in dilemma between a bare metal lacquered finish and sprayed red alkyd paint. finally i went with the alkyd paint finish. My grandfather used to paint with alkyd paint, now as i sniff the peculiar smell of the alkyd paint, memories come to mind. Good ones.

    Bottom cover is of new style instantaneous opens/closes if you you learn how with a small screw driver.
    I wont say much more. Comments are yours..






















    Cheers,
    Barou


    ps: i used an HVLP for spraying the alkyd. It produced an almost complete orange peel look. Its way too good to me.
    Last edited by Baroutologos; 09-17-2016 at 05:49 PM.

  25. #85

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    It has been some time since last post. One thing i want to show to Baroutologos lantern owners is that all L models and K models can work with a USB to 5.5mm 2.1mm cable, assuming their charger is of good quality and current regulated.

    **

    I use every night and day one of my lanterns (BAT 158 red color, L model) and i was sick of using the bulky (but fast) charger. So, i got a cheap a USB to male 5.5mm 2.1mm cable and i have one charger and i share it between my adroid and my lantern. I also use this cable for charging up the lantern from a car USB/ mains charger.

    Small things that keep me happy i guess.

    Cheers to all,
    Barou

  26. #86
    Flashaholic* thermal guy's Avatar
    Join Date
    Jan 2007
    Location
    ny
    Posts
    4,391

    Default Re: Baroutologos's Handcrafted - Rechargeable LED Hurricane Lanterns

    I’m just seeing these for the first time! They look awesome and for what your getting they seem very well priced.
    If i had one day left to live i would want to be at my workplace.Because every day is like a frickin eternity.

Page 3 of 3 FirstFirst 123

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •