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

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djozz
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xevious wrote:
Sorry if this is an obvious answer to most people here…
But does this board & LED component include the driver as well, such that all one needs to do is desolder the original component and solder in this replacement? No thermal paste required?

This is a replacement board for the BLF LT1 lantern, to be used directly with the original driver. So a little thermal paste can’t do harm although without it it will likely be fine too.

Edit: oh, maybe you refer to those square boards that Lampman just posted, I know nothing about those Facepalm

xevious
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djozz wrote:
This is a replacement board for the BLF LT1 lantern, to be used directly with the original driver. So a little thermal paste can’t do harm although without it it will likely be fine too.

Edit: oh, maybe you refer to those square boards that Lampman just posted, I know nothing about those Facepalm

Thanks. Yeah, got it that it’s an LT1 replacement board… just wasn’t sure the extent of the task involved. I do have some thermal paste lying around from a CPU replacement that I never ended up doing (determined it was too obsolete). I’m totally fine with soldering wires… just haven’t made any thermal paste applications. I know with CPU’s it’s really tricky to do right, as you don’t want any air bubbles. So, was just hoping this LT1 board replacement was only a matter of soldering a few wires.
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As far as thermal paste goes, here we’re not dealing with the high wattages of CPUs and everything squishes down so air bubbles aren’t a problem. You just squirt a little bit of thermal paste on and push the board down.

xevious
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Sunnysunsun wrote:
As far as thermal paste goes, here we’re not dealing with the high wattages of CPUs and everything squishes down so air bubbles aren’t a problem. You just squirt a little bit of thermal paste on and push the board down.
Good to know — thanks, Sunny!
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I have a question about the option on the sunlikelamp website: “soldering LEDs (low-temperature paste 138°)”

Do we need to select this in order to get the LED’s we order soldered on?

If I order an extra board without LED’s, is there a reason to select this (for example, will I be able to skip applying my own solder paste)?

Rayoui wrote:
I wonder if I could just purchase the bare PCBs and solder my own E21As onto it. Looks like the pads might actually be compatible albeit a bit larger. I’d like to do something with a larger CCT range; possibly down to 2200K or even 2000K.

It looks to me like it should work.

It looks like the solder pads on this LT1 board will be about 2mm tall, with a 0.5mm gap between them. This is larger than the E21A needs and should not cause any issues with shorting, as long as they line up right during the reflow.

E21A’s are supposed to be more difficult to reflow than most emitters, though.

Tom E
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Just placed an order for 1 full up board.

Oops - wai'tn on PP instructions.

Sunnysunsun
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iamlucky13 wrote:
I have a question about the option on the sunlikelamp website: “soldering LEDs (low-temperature paste 138°)”

Do we need to select this in order to get the LED’s we order soldered on?

If I order an extra board without LED’s, is there a reason to select this (for example, will I be able to skip applying my own solder paste)?

Rayoui wrote:
I wonder if I could just purchase the bare PCBs and solder my own E21As onto it. Looks like the pads might actually be compatible albeit a bit larger. I’d like to do something with a larger CCT range; possibly down to 2200K or even 2000K.

It looks to me like it should work.

It looks like the solder pads on this LT1 board will be about 2mm tall, with a 0.5mm gap between them. This is larger than the E21A needs and should not cause any issues with shorting, as long as they line up right during the reflow.

E21A’s are supposed to be more difficult to reflow than most emitters, though.

I think you need to select that to get your LEDs soldered on. You can probably get them on the tape if you don’t select it. If you’re soldering your own LEDs on, you need to apply your own solder paste since solder paste typically has an expiration time (once applied on the board) of a few hours due to the flux evaporating.

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Tom E wrote:

Just placed an order for 1 full up board.


Oops – wai’tn on PP instructions.


I just send it by email Cash

BelMORDOR’s Ламповщик|Lampman
https://t.me/sunlikenews

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iamlucky13 wrote:
I have a question about the option on the sunlikelamp website: “soldering LEDs (low-temperature paste 138°)”

Do we need to select this in order to get the LED’s we order soldered on?

If I order an extra board without LED’s, is there a reason to select this (for example, will I be able to skip applying my own solder paste)?

It mean that I will solder it by myself. If you need just leds with pcb separately, do not choose it

BelMORDOR’s Ламповщик|Lampman
https://t.me/sunlikenews

iamlucky13
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SunLike wrote:
iamlucky13 wrote:
I have a question about the option on the sunlikelamp website: “soldering LEDs (low-temperature paste 138°)”

Do we need to select this in order to get the LED’s we order soldered on?

If I order an extra board without LED’s, is there a reason to select this (for example, will I be able to skip applying my own solder paste)?

It mean that I will solder it by myself. If you need just leds with pcb separately, do not choose it

Thanks for clarifying.

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Wow. Missed this project until now. Really wish the bottom end CCT was 2200k or less. 2000-3500 would be just right IMO.

https://fundrazr.com/osturaband

No affiliation, just a fan.

djozz
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JaredM wrote:
Wow. Missed this project until now. Really wish the bottom end CCT was 2200k or less. 2000-3500 would be just right IMO.

I ordered an unpopulated board too, to use whatever interesting leds that can be found Smile
xevious
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djozz wrote:
JaredM wrote:
Wow. Missed this project until now. Really wish the bottom end CCT was 2200k or less. 2000-3500 would be just right IMO.

I ordered an unpopulated board too, to use whatever interesting leds that can be found Smile
Ah, the joy of reflowed emitter skills… Cool
djozz
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xevious wrote:
djozz wrote:
JaredM wrote:
Wow. Missed this project until now. Really wish the bottom end CCT was 2200k or less. 2000-3500 would be just right IMO.

I ordered an unpopulated board too, to use whatever interesting leds that can be found Smile
Ah, the joy of reflowed emitter skills… Cool

The first thing that I learned myself when I started the hobby. But I know the feeling, I have that when someone mentions to just flash the newest Anduril to solve a problem Sad (I have little computer skills, and no windows computer).
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On a related note, does anyone know where I could source E21a emitters to use on the LT1 board? Clemence’s site is still under construction and Hank doesn’t have bare emitters listed on his store. Going to need a bunch of them to populate several of these boards.

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SunLike wrote:
Tom E wrote:

Just placed an order for 1 full up board.

Oops - wai'tn on PP instructions.

I just send it by email $)

K, PP payment made.

Sunnysunsun
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Rayoui wrote:
On a related note, does anyone know where I could source E21a emitters to use on the LT1 board? Clemence’s site is still under construction and Hank doesn’t have bare emitters listed on his store. Going to need a bunch of them to populate several of these boards.

https://www.eurekatronix.com/shop

Rayoui
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Sunnysunsun wrote:
Rayoui wrote:
On a related note, does anyone know where I could source E21a emitters to use on the LT1 board? Clemence’s site is still under construction and Hank doesn’t have bare emitters listed on his store. Going to need a bunch of them to populate several of these boards.

https://www.eurekatronix.com/shop

Already tried there. You can add to cart but can’t actually purchase anything.

MtnDon
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Rayoui wrote:
Sunnysunsun wrote:
Rayoui wrote:
On a related note, does anyone know where I could source E21a emitters to use on the LT1 board? Clemence’s site is still under construction and Hank doesn’t have bare emitters listed on his store. Going to need a bunch of them to populate several of these boards.

https://www.eurekatronix.com/shop

Already tried there. You can add to cart but can’t actually purchase anything.

Have you tried email contact? The last time I was there the checkout page told the user to contact them. There is an email on their contact page. I would try contacting clemence thru the email.

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MtnDon wrote:
Have you tried email contact? The last time I was there the checkout page told the user to contact them. There is an email on their contact page. I would try contacting clemence thru the email.

I did get that message, but I’m also waiting for Clemence to fulfill an outstanding order that I paid for over a year ago, which is part of the reason I was hoping there is another source for E21A. Unfortunately it looks like there isn’t, unless I want to order and entire reel.

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Oh. Covid hit Indonesia quite hard

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It will be interesting to see what impact the LT1’s opaque white lens will have on red emitters. Has anyone tested this yet to confirm?

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FlashPilot wrote:
It will be interesting to see what impact the LT1’s opaque white lens will have on red emitters. Has anyone tested this yet to confirm?

The diffuser should be color neutral, so the red should remain red.

I seem to recall somebody sharing an emitter swap in an LT1 to replace the CW LED’s with photo red XP-E2’s, but I can’t find it now.

djozz
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Diffusers mainly lower the blue region of the spectrum, relative to the rest, red gets out relatively easy.

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Rayoui, Cutter sells some E21A leds, nothing loose though, all mounted on mcpcb’s

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email me for emitter sales
cheers

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Web: https://www.cutter.com.au

Tom E
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Any idea when these will ship? How many orders have there been?

I know I'm gonna forget about this...

EmptyWallets
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It’s been about 2 months, some form of update would be nice…

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It looks like there is another option for extremely warm white aside from E21A’s.

A member of the flashlight reddit shared recently that Luxeon 2835N is available from Mouser in 1800K, 90 CRI. These are 2835 size, so they should be a perfect fit for Sunlike’s board:

https://www.mouser.com/ProductDetail/Lumileds/L128-1890NA3500001?qs=pUKx...
https://www.mouser.com/ProductDetail/Lumileds/L128-1890HA35000B1?qs=W%2F...

A 2200K, 90 CRI version is also available:
https://www.mouser.com/ProductDetail/Lumileds/L128-2290NA3500001?qs=pUKx...

The datasheet is here:
https://lumileds.com/wp-content/uploads/files/DS216-luxeon-2835-architec...

These are mid-power LED’s – binned at 65mA, max rated current 300mA for the N series (1st link) and 480mA for the HE series (2nd link). This should be fine for the LT1. Maximum current per emitter with 7 × 7135’s divided by 18 emitters would be 136 mA.

The spectral graph is on the bottom half of page 10 of the datasheet. I’m sure it’s not Sunlike level CRI, but it looks as it should – still a little light available past 450nm on the blue end of the spectrum, and lots of light at 650 nm and beyond on the red end.

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iamlucky13 wrote:
It looks like there is another option for extremely warm white aside from E21A’s.

A member of the flashlight reddit shared recently that Luxeon 2835N is available from Mouser in 1800K, 90 CRI. These are 2835 size, so they should be a perfect fit for Sunlike’s board:

https://www.mouser.com/ProductDetail/Lumileds/L128-1890NA3500001?qs=pUKx...
https://www.mouser.com/ProductDetail/Lumileds/L128-1890HA35000B1?qs=W%2F...

A 2200K, 90 CRI version is also available:
https://www.mouser.com/ProductDetail/Lumileds/L128-2290NA3500001?qs=pUKx...

The datasheet is here:
https://lumileds.com/wp-content/uploads/files/DS216-luxeon-2835-architec...

These are mid-power LED’s – binned at 65mA, max rated current 300mA for the N series (1st link) and 480mA for the HE series (2nd link). This should be fine for the LT1. Maximum current per emitter with 7 × 7135’s divided by 18 emitters would be 136 mA.

The spectral graph is on the bottom half of page 10 of the datasheet. I’m sure it’s not Sunlike level CRI, but it looks as it should – still a little light available past 450nm on the blue end of the spectrum, and lots of light at 650 nm and beyond on the red end.

These look quite promising. I’ve been really busy over the past month and have been unable to follow blf. I sent an email to LampMan yesterday and I’m waiting on a reply.

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