As led4power said, it is an aluminium spacer 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
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 I guess now I’ll have to try the triple with those leds :person_facepalming: :sunglasses:
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!
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.
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.
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.
LD-B4 doesn't have mosfet on its own board, mosfet should be on mcpcb. Because you want to use 4x 219c on separated boards, you should connect these 4 leds in parallel like with normal drivers and connect cathodes to mosfet drain that is mounted separated mcpcb. I there enough space for one 20mm mosled pcb (with mosfet only on that pcb) in your flashlight? LEDs can be on standard copper dtp.