*BLF LT1 Lantern Project) (updated Nov,17,2020)

Provided that a pin on the MCU is available, there is no extra components or higher price, it does require extra time from skilful BLF members.

GUYS, GUYS.

I found a source for LH351D in America!

Here it is the list if you want:

Here is 5000k 90+CRI:

Here is 4000k 90+CRI:

Here is 3500k 90+CRI:

2700k 90+CRI:

Not all available immediately though. A group buy would be extremely interesting if I could buy at least a reel of it. Anyone want to take part in it?

No offense intended, but didn’t we kinda chat about this yesterday? Digikey carries 8 varieties of the LH351D that are available by the piece, but they don’t have any stock of the 90 CRI - those appear to be special order. It would be nice if they stocked those as well, though.

Either way… I personally feel that 80 CRI would be good enough for campground usage, but I’m definitely not a CRI snob and I don’t mean to spoil anyone’s fun that has an appetite for 90+ CRI.

Oh, I didn’t understand. Sorry too if I offended you too.

To get different colors LH351D emitters though, we could start a group buy. However, I doubt we could buy 800 of them though.

The only ones that are on offer from Digikey right away are the 5000k and 2700k.

I could send 2700k LH351Ds to test them out, and see if they are more efficient that the small die LH351Bs 3000k 90CRI+.

No sweat. And thats weird, I’m showing 8 of them total, with 4 of them being 80CRI:
3000K 3500K 4000K 5000K

That’s probably pretty do-able. It could use 1x7135 for a warm tint and 3x7135 for a cool tint, or maybe 2 and 2, or 2 and 3, or something like that. If it’s intended to always be warm when low and cool when high, it wouldn’t even require any code changes — just a new ramp table.

Or it could do manual color temperature changes — a single ramp which splits into both emitter types based on a user-adjustable balance.

Or it might be possible to fit both.

If the hardware has two individually-controllable tints, I can find a way to make it work. The main questions are whether the idea is worth doing, and how exactly it should work.

Creating the firmware and designing the board circuit is out of my capability range, but Toykeeper i believe can chime in on that idea. In this case a similar LED star as the Q8, but with pads for eight LEDs, with dual input paths for four each of 3000K & 4000K. (maybe we can get some of the other Q8 developers in on this project too. hints

Interesting ideas definitely.

Is the lantern originally designed for two LEDs? If so, a two-color design should be feasible with four total emitters. Or if there’s too much angular shift with two of each, maybe it could do three of each? I doubt four of each would be needed, especially at the low levels the lantern is running at.

If it has two tints, I’d suggest doing ~3000K and ~5000K, or if they’re available, perhaps even warmer than 3000K.

If user-adjustable color is desired it may also be worth increasing the total number of 7135 chips, so it can reach the original brightness target at any tint. That will move the levels a bit farther apart at the low end, so the bottom end of the ramp won’t be as smooth, but it’ll probably be fine.

I am interested! Please put me down for 1.

Since i am using the Q8 star in the V2 prototype, it now has four LEDs. Right now I plan to increase the number of the main 7135s to four (for 1.4 amps max) next week after the first field testing with the three , ( + the original one already on the driver for the low modes.

I added you at number 779 on the interest list

interest list sorted by entry number

interest list sorted by user names

interest list sorted by entry number

interest list sorted by user names
[/quote]

Can you please add me for a second unit. Itsme #626

Thanks

Just spoke to my friend and he wants one too so please put me down for one more making it a total of 2 for me, thanks!

For some reason its double-spacing each line, and can’t get it to consolidate to single-line list like the OP has, to update the OP.

Both itsme and flashycali added for a second. Not sure why, but the second link posted by itsme does not work right, but the link in my post above does, as do the ones in this post.

interest list sorted by entry number

interest list sorted by user names

The list by number or name? I am guessing the one by name.

Both. When i copy form google docs to a .rtf file, is spaces them twice, and cant get them to consolidate to a single line for each number as it is in the list in the OP.

Ok, send you both files in a few different formats, guessing the MHTML might be the best to try first. Here is what that one looks like when I post it, I am using Chrome, and I need to use the advanced post editor or else it gets all scrunched together.

By number:

1 DBSAR

2 DBSAR

3 DBSAR

4 DBSAR

5 DBSAR

6 SaniPE

7 brad

8 Gunga

9 Andyman

10 emarkd

11 chuckhov

By user name

User Name

Quantity

Entry number

18sixfifty

1

72

808Hi

5

582, 609, 651-653

a_idoux

1

779

Aardvark

1

48

Aardvark Spleen

2

127, 128

Abe87

4

154, 367-369

acml

1

113

adrn77

1

667

adsum

1

276

Definitely interested.
This is an overdue project.