spottie build (finished)

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ThembaFatsani
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spottie build (finished)

Hello BLF.

I am have been wanting to build an LED spottie for a while and have finally gotten myself started.

I have read up a fair amount on the BLFGT – GT70 and enderman’s searchlight builds, I’m nowhere near that level but I’m having fun anyway.

I have been learning / reading and purchasing components as I go along, which has led me to ending up with some less than ideal solutions (ie: my 6v 10a step down). I am learning though. slowly.

my plan is to run the light on clamps to a car battery while hunting. about 13v.

The LED I have on hand is a 6v MT-G2.

mountain electronics do not have a driver that will supply over 6A.

I think im going to have to end up building my own driver.

anyone know of an off the shelf solution for 7 or 8 amps and up to 7 or 8 volts from 13v?

I’ll keep doing what I can and trying to learn on the fly.

Here’s what I have going at the moment:

EDIT:

the ingredients (including postage, in AUD)
:

$10 6v MT-G2 on noctigon
https://intl-outdoor.com/led-mtg2-c-107_138.html

$90 Ledil SEANNA
https://au.mouser.com/ProductDetail/ledil/fcp13895_seanna-a/?qs=OLAVh0ig...

$30 lamp shade
https://www.ebay.com.au/itm/Retro-Pendant-Light-Shade/112483190718?ssPag...

$16 rifle pistol grip
https://www.ebay.com.au/itm/Rifle-Pistol-Motor-Grip-Hunting-Ergonomic-Fi...

$6 stainelss mesh
https://www.ebay.com.au/itm/4-10-50-100-Mesh-304-Stainless-Steel-Woven-W...

$7 power step down… yes i know bad idea ….
https://www.ebay.com.au/itm/DC12V-To-DC6V-10A-60W-Step-Down-Power-Supply...

$13 cpu heat sink and fan
https://www.ebay.com.au/itm/INTEL-Copper-Core-i3-i5-i7-CPU-Heatsink-Fan-E97379-001-Cooler-LGA-1155-1156/202346783015?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

and a bunch of little things like wire heat shrink, a switch and a fuse etc…. probably cost about $200 all up.

for tests i’m running off a 3s lipo, normally it will be plugged in to the cigarette lighter port in the car.

I was originally looking at buying one of these:
https://www.ebay.com.au/p/LIGHTFORCE-SL-2406-Blitz-Handheld-Spotlight-Sp...
but i think my light is at least close in performance, probably brighter, maybe less throw.

All up im pretty stoked with the way it turned out.

Edited by: ThembaFatsani on 10/30/2018 - 09:55
ThembaFatsani
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Update. I have pieced most of this thing (!?) together, and I am reasonably ok with where it is at. Seems to punch out a pretty good and useful beam , although of course I just want it to be more powerful hehe.

 

I still have a way to go before it's done.

 

Here is the progress.

 

https://imgur.com/a/4IIruMl

Enderman
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Nice job, it looks good! Big Smile

ThembaFatsani
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Enderman wrote:
Nice job, it looks good! Big Smile

After seeing your work I’m about ready to print out your comment and frame it Big Smile

I might have to update it to a better driver and better heat management some time in the future. It seems to be ok at the moment but if I’m going to ramp it up I might need more serious cooling.

I hope to have it all cleaned up and finished by tomorrow night.

ImA4Wheelr
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Congrats on the build!  Most buck drivers can operate over a broad range of input voltage and will deliver whatever voltage the emitter needs automatically.  There should a good number of buck drivers that can handle automotive voltages and deliver 6 amps to your emitter.  

The HX-1175b is pretty robust.  I don't know who has the best price these days.  Here is the first link I found. If you don't want the 5 modes (L, M, H, Strobe, SOS), you can jumper the PWM pin to the MCU's VCC pin for single mode.  I don't recall the stock current that it is designed to deliver.  I think it's about 7.5 amps.

There are probably some even lower cost options, if you don't mind a rectangular shaped driver (which it appears you would have no problem using in your build).  I'm just not aware of which ones will work for you at this moment as I have not shopped for buck drivers in some time now.

Best wishes on your driver quest.

EDIT:  Here are some builds using the HX-1175b delivering various amps MT-G2 or multiple 3v emitters in series:

http://budgetlightforum.com/node/30670#node-30670

http://budgetlightforum.com/node/34059

http://budgetlightforum.com/node/40917

Here is a thread on the HX-1175b:

http://budgetlightforum.com/node/31914

 EDIT2: Sorry for all the edits.  Kept thinking of things I forgot to say.

 

Agro
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Nice!
I really like the format and the use of Seanna. However, have you considered using another LED? MT-G2 is quite dated…

Enderman
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ThembaFatsani wrote:

After seeing your work I’m about ready to print out your comment and frame it Big Smile

I might have to update it to a better driver and better heat management some time in the future. It seems to be ok at the moment but if I’m going to ramp it up I might need more serious cooling.

I hope to have it all cleaned up and finished by tomorrow night.


Hahaha Smile
I’m glad I could inspire someone with my work!
From now on you’ll just want more and more power Big Smile
Kame Sennin
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For  a driver that will let you adjust the current in the led you can search aliexpress (or alike) for "10A CC CV buck"

(No fancy modes as this is not a "real" led driver but ok if all you want is OFF/Max Power)

 

ThembaFatsani
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thanks for the info A4. that is a big help to me.

agro i just really love the light ot of my TK35UE …. I wanted something similar again. the only other thing i was looking at was the 70.2 because of the GT70. might change or ot at some point.

ender… yes … UNLIMITED POWER!

thanks for the info kame, ill have to try as few things i think.

ThembaFatsani
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got a little more done today.

spot light build pt.2 https://imgur.com/gallery/YSo2aI0

MRsDNF
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You got lots done. I’d say you have nearly finished. Its looking real good. Beer

 

djozz quotes, "it came with chinese lettering that is chinese to me".

                      "My man mousehole needs one too"

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

ThembaFatsani
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sadly while trying to install the fan i broke afin off it …. do gt have a spare on hand … waiting for the mail man again.

eas
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Nice. I believe Enderman has used one of Lexel’s buck drivers for a high-power build.

As others have said, inexpensive ebay constant current buck converters should work, but I’d be a little worried about spikes at turn-on. Whatever you do, you’ll want to derate from the sellers claim. Ie, if you want 10A, look for something closer to 20A.

ThembaFatsani
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getting towards finishing the first iteration of my spotlight build, already dreaming of another bigger and better beast.

enderman’s x10m candela reflector is probably what i would call perfect, shining the led face down n at a shallow reflector. the special reflector is not in a price range im ready to go for right now though.

I’d like to hack something together a little more home brew style if i can.

most recently im thinking of a 3d printed buck of the reflector parabola, and thermo forming some 10mm thick plexi to create the lens, and then vacuum / thermo forming on to that with mylar space blanket for the reflective surface.

not the strongest but it would have to be cheap, and i think you could get pretty good results.

anyone here tried anything similar?

ThembaFatsani
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All finished. here’s a link to pt 3 of the build for anyone interested. http://imgur.com/gallery/TuwNB59 I think I’ll call it a success, I’m looking forward to building something with more punch next though… I think the bug might be biting.





pinkpanda3310
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Very nice finish Thumbs Up Great build Beer

MRsDNF
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Looks terrific TF. Well done and be careful of that bug. I dont know if there is a cure. Thumbs Up

 

djozz quotes, "it came with chinese lettering that is chinese to me".

                      "My man mousehole needs one too"

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

djozz
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MRsDNF wrote:
Looks terrific TF. Well done and be careful of that bug. I dont know if there is a cure. Thumbs Up

Bug can’t be cured, can be harnassed by evil wife though..

Very nice build! It would have been a worthy entry for the OL from scratch build contest. Smile

Enderman
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djozz wrote:

Bug can’t be cured, can be harnassed by evil wife though..

Very nice build! It would have been a worthy entry for the OL from scratch build contest. Smile


Can confirm, it is permanent, never enough lux.
LouieAtienza
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Great build! I’m expecting delivery of a couple Seanna fixtures next week; your build has me pumped up to start mine. Now just a matter of which LED to use…

CRX
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Cool Thumbs Up

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