Project: SUNLIKE LT1 board (Option for 660nm Red)

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Sunnysunsun
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Project: SUNLIKE LT1 board (Option for 660nm Red)

Update 08/08/21: I’ve contacted LampMan via Email and he says the LT1 boards have been sent to production and he should receive them in September. He apologizes for the lengthy time it has taken.

Update 03/23/21:

Seems like LampMan is bringing this to the preorder phase

If you are interested, please go to his website here and order the specification you want. He will send you an email to pay and once we get 10 orders/payments, the design/testing phase will begin.

Based on LampMan’s history on BLF and the favorable tests of his products on BLF, I believe this project is in good hands.

SunLike wrote:
I think I will add this board to my site, customers will place an order after that I will give paypal from my business partner from China for payment. After 10+ payments I will order this flashlight. After I received (seems like 2-3 month) it I will finalized project and give it to the factory and after 1.5-2 month I will received 100-150pcbs and stencil

All done! Who need this pcb, just place order HERE and I will send paypal account for payment (with 5% fee)
It is possible to place order without registration, and there’s english language with button on the top

I think that will be better to add this to head comment

As you can see, way to speed up the project is send flashlight to me faster that Sofirn Official Store from aliexpress.

I’ve been speaking to BelMORDOR (LampMan) who makes the sunlike bulbs about a replacement LED board for the LT1.

He would create and sell a board with 16+16 2700k/5000k sunlike 2835 SOL emitters with a CRI of around 98.
You could also choose your own tints from 2700k, 3000k, 3200k, 4000k, 5000k, and even 5600k if you wanted to.
*660nm Red will be available *

With 16 of each emitter, efficiency would also go up, by my calculations the LT1 would run about 1000 Lumens with 7 amc7135s active instead of the 840ish it currently makes. With more emitters spread out and each individual emitter being less intense, the glare and the harsh spots like these should also be reduced significantly.

Efficiency should also increase slightly and the top of the lantern should run a bit cooler with the base being just a tiny bit warmer which is desirable since currently the top of the current LT1 heats up a lot much more than the base. Runtimes would not change since the 7135s let through the same current but will burn off more voltage since these have a lower Vf than LH351Ds.

Tint should be pretty decent. It looks like there will be a bit of green when only one set of emitters is active, but that will quickly disappear when you start tint mixing.

It seems like this could be done with the final cost being about $12 a board+$4 shipping. This would be designed as a direct replacement for the LT1. Buyers would need to hex key, screwdriver, soldering iron, and some thermal paste to do the swap.

Edit: looks like the price would be closer to $14 + $6 for shipping+$1 to cover the PP fee ($21 total)

What do you guys think?

I don’t know how much of a difference this will make since the LT1 already has some pretty good emitters. Perhaps someone who has used some sunlike bulbs can chime in. This is an incremental improvement and I don’t know how visible/noticeable the difference will be but $16 is not a bad price.

Sure there might be slightly better emitters out there but I think this might be the only shot to getting something like this made and available to everyone.

I’ll keep an interest list in this thread, let me know if you’re interested or your thoughts for how you would do this differently.

I am not super knowledgeable about tints (green and rosiness) so some input by you guys would be very valuable.

Edited by: Sunnysunsun on 08/08/2021 - 11:11
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Edit: If you would really like to see this come to fruition, make an order on Sunlike’s website.

Interest List

1. Sunnysunsun
2. BarryBaltimore
3. TMaxxJJ
4. shirnask
5. shirnask
6. shirnask
7. shirnask
8. Djozz
9. atobe
10. atobe
11. chrisddo
12. chrisddo
13. Argro
14. iamlucky13
15. MtnDon

cetary
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I’m interested, but I really want 2200K/3000K for my LT1.

Sunnysunsun
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cetary wrote:
I’m interested, but I really want 2200K/3000K for my LT1.

I’m checking in with BelMORDOR to see if anything warmer than 2700K would be possible. He said 2250K isn’t possible but I’m checking if that’s an absolute no.

Edit: seems like 2700K will be the lowest cct available.

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ok. Just LampMan Hat

p.s. BelMORDOR it is BELARUS. Based on this picture Big Smile

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cetary wrote:
I’m interested, but I really want 2200K/3000K for my LT1.

sorry, only 2700k. You can get ~2600k by using poorly transparent diffuser

If you worry about blue, so

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This topic was discussed earlier in the hundreds of LT1 pages but I don’t believe it ever came to fruition https://budgetlightforum.com/comment/1668890#comment-1668890

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Sunnysunsun wrote:
The LT1’s mcpcb diameter looks to be about 50mm. I haven’t opened mine up yet and I haven’t found it by searching online so I’d say about 50mm +/- 10mm

I need correct +/- 0.5mm

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Of course. Let’s see how much interest there is first. If there’s enough interest for you to think it’s worth making, then we can get into the specifics of everything. I don’t have a pair of calipers around me at the moment so I don’t want to rely on myself to get the +/-0.5mm correct measurement.

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Sunnysunsun wrote:
Of course. Let’s see how much interest there is first. If there’s enough interest for you to think it’s worth making, then we can get into the specifics of everything. I don’t have a pair of calipers around me at the moment so I don’t want to rely on myself to get the +/-0.5mm correct measurement.

even if you are alone, I will draw it for 100$
after that I can order PCBs and stencil

Price Cash

In this time (cose you payed for prototyping) pcb will cost the same price with factory ~1$

ordinary price is 2.5$ for Ø65×2mm http://sunlikelamp.com/index.php?route=product/product&path=80_106&produ...

so

1+1.5(soldering)+32×0.3=12.1$+shipping

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Th558
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I might be ineterested in a 16+16 2700k / 5600K but that’s if it’s the actual whole light. As for just the board itself, it depends if I can get someone to fit it for me. How much better will the tint be compared to the original? The LH531Ds are not know for being rosy so I’m guessing these will look a lot better.

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Interested in 4

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Tint wise, I don’t actually know. Come to think of it, I have no problems with the current LT1 tint. This would help reduce the harshness of having just 4 LEDs.

From speaking to Barry at sofirn, I don’t think sofirn would be willing to do it. They seem to care more about the scale of things compared to Hank or Simon who will custom make anything. Barry is always talking about workers being too busy at the factory.

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Th558 wrote:
I might be ineterested in a 16+16 2700k / 5600K but that’s if it’s the actual whole light. As for just the board itself, it depends if I can get someone to fit it for me. How much better will the tint be compared to the original? The LH531Ds are not know for being rosy so I’m guessing these will look a lot better.

SunLike SOL 2835 4000k spectrums:


Maukka’s results:


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TMaxxJJ
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Definitely interested!

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With this picture Ø is 63mm and 29.5mm between holes and 6.5mm middle hole

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I sent a message to DBSAR to see if we can get the exact measurements of the LT1 board. How did you come to those measurements? Did you read them somewhere or did you look at the photograph and estimate it out?

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Sunnysunsun wrote:
I sent a message to DBSAR to see if we can get the exact measurements of the LT1 board. How did you come to those measurements? Did you read them somewhere or did you look at the photograph and estimate it out?

it was easy Davie
I know that size of the leds is 3.5mm Grad

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The sizes came from me, as quoted from the LT1 thread:

djozz wrote:
I have a request for someone who has experience and is willing to do circuit board drawings and upload it to Oshpark (as I can not do that)

Here is the LT1 ledboard:

*Outer diameter=60mm
*Central hole=6.3 mm
*Screw holes are 2.8mm (for M2.5 screws) and are 20mm from the middle (or 28mm from each other).
*center of the anti-rotation holes for the plastic cup are 8.5mm from the middle and are 2mmx4mm width/length.

The request is to draw a commonly from Oshpark orderable frp replacement ledboard for 2×20 standard 3030-size midpower leds, so 20xwarm and 20xcool. If the warm and cool leds can be mixed well (as far as the traces allow), the tint mixing of the lantern will profit.

As the midpower leds will receive 100mA per led, I’m pretty sure a metal core board is not needed if you order the board in thin 0.8mm frp and perhaps choose the thicker copper tracing. The board can, like the stock board, be screwed down with some thermal paste in between.

This makes the LT1 suitable for the entire range of available standard midpower leds, including Optisolis, SunLike, and all the others.

Of course if someone dares to have real MCPCB’s for 3030 leds made and sold, that would even be better. But it all starts with the design.

And I sure am in for one of these boards, but the value would be much better for me if it had the combination of 5000K and 2250K Sunlike leds.

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djozz wrote:
The sizes came from me, as quoted from the LT1 thread:

djozz wrote:
I have a request for someone who has experience and is willing to do circuit board drawings and upload it to Oshpark (as I can not do that)

Here is the LT1 ledboard:

*Outer diameter=60mm
*Central hole=6.3 mm
*Screw holes are 2.8mm (for M2.5 screws) and are 20mm from the middle (or 28mm from each other).
*center of the anti-rotation holes for the plastic cup are 8.5mm from the middle and are 2mmx4mm width/length.

The request is to draw a commonly from Oshpark orderable frp replacement ledboard for 2×20 standard 3030-size midpower leds, so 20xwarm and 20xcool. If the warm and cool leds can be mixed well (as far as the traces allow), the tint mixing of the lantern will profit.

As the midpower leds will receive 100mA per led, I’m pretty sure a metal core board is not needed if you order the board in thin 0.8mm frp and perhaps choose the thicker copper tracing. The board can, like the stock board, be screwed down with some thermal paste in between.

This makes the LT1 suitable for the entire range of available standard midpower leds, including Optisolis, SunLike, and all the others.

Of course if someone dares to have real MCPCB’s for 3030 leds made and sold, that would even be better. But it all starts with the design.

And I sure am in for one of these boards, but the value would be much better for me if it had the combination of 5000K and 2250K Sunlike leds.

so.. it is not samsung LH351D what is 3535 size

if 28mm from each other, it is 19.8mm from the center..

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I would also prefer somewhere around 2000k + 5000k if at all possible

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TMaxxJJ wrote:
I would also prefer somewhere around 2000k + 5000k if at all possible

no. only 6w 35v COB can be 2200k

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Hey BelMOR, do you think it would be possible to move the LEDs closer to the centre of the light? This would help make the glare softer since the light will have more room to spread out before it hits the diffuser

Space is limited but every little bit away from the edge helps

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Sunnysunsun wrote:
Hey BelMOR, do you think it would be possible to move the LEDs closer to the centre of the light? This would help make the glare softer since the light will have more room to spread out before it hits the diffuser

Space is limited but every little bit away from the edge helps !{width:80%}https://abload.de/img/8bcab39a-4465-4a37-adnjtf.jpeg!

LampMan Facepalm

Need additional space to outside leds negative contacts

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SunLike wrote:
Sunnysunsun wrote:
Hey BelMOR, do you think it would be possible to move the LEDs closer to the centre of the light? This would help make the glare softer since the light will have more room to spread out before it hits the diffuser

Space is limited but every little bit away from the edge helps !{width:80%}https://abload.de/img/8bcab39a-4465-4a37-adnjtf.jpeg!

LampMan Facepalm

!{width:76%}https://sun9-54.userapi.com/impg/wkaKO7vvJiU7fsQgKi29aSCJoks1rh3eVvuJTA/...!

LEDs closer to the middle of the light like in my photo. Further away from the edge would be best I think

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ok. After payment

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I’m interested in 2

"☚ (<‿<)☚"

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SunLike wrote:
!{width:76%}https://sun9-27.userapi.com/impg/00TtKE5EBm7cq5a_VWZDtDvwv87eQJCXUvqoug/...!

This one Looks very promising.

SunLike wrote:
ok. After payment

I would like to do this in a group buy format. If we have enough interest for 100 pcs, you would then make a prototype, send it out to someone like Djozz who has the testing equipment to double check that it functions well with the LT1. Once he gives the green light that it’s ready, you would get the boards made, assembled, then list them on your website.

You can add in your fee onto each board (so maybe $1 per board?) to recuperate your costs for designing the boards rather than having one person carry the entire burden for the design fee. I think the $16-17 shipped price is a reasonable price at which people would buy the boards at, are you alright with it?

I would only like this project to go ahead if we can garner enough interest to make it worthwhile for you to make it and sell it at a reasonable cost.
Are you okay with this proposal BelMOR?

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I’d find this very interesting thread here:
https://budgetlightforum.com/comment/1753715#comment-1753715

And like to ask, if an complete LT1R with already installed SUNLIKE LT1 board might be possible?
I would be definetely interested then. Sure in for 2 copies with 2700K and 660nm red if complete assembled with LT1.

But swapping the existing board out and a new one in with having a useless spare one wouldn’t be for me.

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