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

Strange, it loaded one to the shopping cart for me just now

It is working for me too, maybe try a different browser?

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.

Yes, you can get the bare board.

I got it to work.

When I click the Add To Cart button, that button moves down, away from my mouse pointer, and I have to continue holding down my mouse button and move the pointer so it’s on top of the Add To Cart button, then release the mouse button.

Now I’m waiting for an email with Paypal instructions. I’m not clear on the total amount to pay and which currency to select.

Edit: instructions received, Paypal sent.

Hello. I just find 2 new orders today. And I already send 2 emails with paypal data.

Some days ago I finally ordered pcbs. It was 4 projects. For LT1 it will be 1.6mm 100pcs

Sorry for I am so late, too much orders (not LT1 pcb), and not so much orders for LT1. about 20-25 now

also I need upgrade all my Grow LED lamps

GB22 will be like quantum board, but better

- it is with led driver

  • 5 types:
  • 100% white samsung LM30b(h); - LM301b(h) with 660nm and 450nm with switch (GB22S); SunLike 3030 6v; SunLikePLUS 5050 (with uv and IR); StarLike®

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 :person_facepalming:

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.

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!

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 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.

Just placed an order for 1 full up board.

Oops - wai'tn on PP instructions.

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.

I just send it by email :money_mouth_face:

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

Thanks for clarifying.

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