Led4power.com : LD-4 CC linear drivers, ILC-0/1 illuminated tailcaps, optics, MOSX, copper DTP MCPCBs...

I knew I should have waited some more time :person_facepalming: :smiley:

But, I’m happy with my order, received today :wink:
Thanks led4power!! Everything well packed and neat :sunglasses:

I want to make a correction on something I’ve said in the past about thermal protection triggering too soon on my E2L.
Yesterday I rebuilt it with new leds and in the process I noticed because a crumb of dirt got under the mosled pcb during reassembly, the board wasn’t making good thermal contact on the side of the thermistor.
So that explains why thermal protection triggered almost instantly (always less than 15s), and the driver heat management was working as intended all this time :slight_smile: .
After a more careful reassembly it takes something above 30s at 9A before stepdown with factory settings, which is in line with what I had expected in the first place.
I also melted the lighted tailswitch :person_facepalming: , but it’s not the switches fault, I think I might have damaged it during soldering of the spring as it always felt a bit too easy to click, and during a runtime test at 9A it just melted in place :weary:

Wow how’d I miss these? Those silicone pads are sweet! :wink: :+1:

That's actually picture of aluminum spacer in pill, thin silicone pads go on top and bottom of spacer.

That is good example why is good to have temp. sensor on MCPCB instead on driver PCB - in other case driver don't see that something is wrong with PCB contact and LED would probably de-solder itself together with wires which would cause havoc inside of light.

OMTEN switches are unfortunately made from low melting point plastic, so soldering everything around switch is more challenging.

As led4power said, it is an aluminium spacer :wink: I didn’t put the silicone pads as this was for “demonstration” purposes only, when the products arrived!
But this is top notch! Super well made :slight_smile:

BTW, I’m using one of the the Luxeon V (with pebbled TIR lens) …and, honestly, it is the best tint I ever seen!!! Honestly!
So thank you :wink: I guess now I’ll have to try the triple with those leds :person_facepalming: :smiley: :sunglasses:

Oh aluminum spacer?

Can you make silicone pads like this? Never liked hacking up the silicone cubes, never got them to fit precisely. I always thought there had to be something better! :wink:

This is how it should look assembled:

BTW, this only works for LD-A4 driver because mosfet is highest component.

Even better would be if Simon or Kiriba-ru can make solid pill with ~1.2mm depth (LD-A4 has 0.9-1.0mm height), in that case only one silicone sheet would be needed and thermal transfer would be better (but not by much).

When building up a switch assembly, I start with desoldering the switch, when everything is done (spring, bypass etc.) I resolder the switch in place, touching the solder with the iron as short as possible. And still, every third switch that I solder in is destroyed and has to be replaced.

I will probably offer ILC-0 with non-soldered switch for those reasons, so user can solder switch as last step.

Ok.
But I dont see brass reasonable material for pill.
Are you sure that single led is still popular option (in combination with your drivers)?
Another problem, I cant find spare retaining rings anymore. My custom rings are ways more expensive.

What’s a good host for your quad luxeon mcpcb and drivers?

PCB is 20mm, driver is 17mm clicky switch,most people use spacer/kits like form kiriba-ru to fit all in commonly used hosts like convoy M1 etc.

But I dont make M1/M2/X5/VG10 sets anymore…

Added option with non-soldered switch:

XP-L V6 3D DTP (notcigon) vs mosX test:

Results are in table.

This was important/milestone test because a lot of popular single die LEDs come in 3535 footprint.

DTP is a tiny bit better (I calculated how much brighter each LED got in percent), but in reality they are the same with this type of LED.

At higher amps (5+A) ouput quickly starts to drop on both pcbs because heatsinks are not fan cooled,so measurements are not very precise compared to lower amps. I will add fans for other LED tests.

I'm actually little bit surprised how close is mosX to DTP for XP package (even when calculations say the same) since this is package with smallest thermal pad,except osram oslons (but they are almost identical).

I will also test XHP35 HD in a few days, this LED has extreme power density when it comes to Watts/mm2 of thermal pad, but for this LED I actually expect some anomalous results (in a good way for mosX),we'll see what would happen.

How about testing fanless until the output starts to drop and then turning the fan on? I think fanless is more representative of what we see in flashlights.

I did some calculations and XP-L did show some anomalies, on mosX at 6A output should drop close to 5% compared to DTP, but it dropped ~1.5%, I expect similar anomaly for XHP35,at least at similar power levels.

BTW, I don't have integrating sphere, I'm just measuring lux at some (constant) distance from LEDs, for identical type of LED relative output measurement should be correct.