spottie build (finished)

ThembaFatsani · 2018-10-25T14:05:42.000Z

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.

[Album] spot light build progress

Enderman · 2018-10-25T14:08:11.000Z

Nice job, it looks good!

ThembaFatsani · 2018-10-25T14:16:22.000Z

Enderman:

Nice job, it looks good!

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

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 · 2018-10-25T16:10:38.000Z

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:

https://budgetlightforum.com/t/-/26076#node-30670

https://budgetlightforum.com/t/-/28798

https://budgetlightforum.com/t/-/34779

Here is a thread on the HX-1175b:

https://budgetlightforum.com/t/-/26978

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

Agro · 2018-10-25T16:48:34.000Z

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

Enderman · 2018-10-25T18:09:52.000Z

ThembaFatsani:

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

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
I’m glad I could inspire someone with my work!
From now on you’ll just want more and more power

Kame_Sennin · 2018-10-25T19:13:59.000Z

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 · 2018-10-25T21:34:22.000Z

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 · 2018-10-26T05:36:43.000Z

got a little more done today.

spot light build pt.2 spot light build pt.2 - Album on Imgur

MRsDNF · 2018-10-26T08:46:23.000Z

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

ThembaFatsani · 2018-10-27T00:45:56.000Z

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 · 2018-10-27T04:39:06.000Z

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 · 2018-10-30T07:31:59.000Z

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 · 2018-10-30T13:26:24.000Z

All finished. here’s a link to pt 3 of the build for anyone interested. spot light build pt 3, finished. - Album on Imgur
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 · 2018-10-30T13:30:16.000Z

Very nice finish :+1: Great build

MRsDNF · 2018-10-30T19:23:28.000Z

Looks terrific TF. Well done and be careful of that bug. I dont know if there is a cure. :+1:

djozz · 2018-10-30T20:13:38.000Z

MRsDNF:

Looks terrific TF. Well done and be careful of that bug. I dont know if there is a cure. :+1:

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.

Enderman · 2018-10-30T20:42:17.000Z

djozz:

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.

Can confirm, it is permanent, never enough lux.

LouieAtienza · 2018-12-08T01:40:10.000Z

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 · 2018-12-08T09:52:11.000Z

Cool