pic !
Anyone ever had THIS happen?!
Sorry ’bout the Sea of Fujik… :bigsmile:
Ouch! No, how exactly did you go bout this and what emitter is that?
I've had that happen too with dedomed emitters. I assumed it was flux splattered from soldering the wires to the base. I have since been covering the emitter when soldering near it and then cleaning the emitter and base with alcohol and Q-tip. Haven't had it happen since., but could be a coincidence.
I suggest less Fujik for starters :bigsmile:
It says “XML” on the PCB :)…
I did the same thing the first time I dedomed an XML.
So I used a blade to cut the dome off partially and then dremel it down. Then when I turn on the light, smoke came off from the emitter. And there is a black spot just like this. It is still a myth to me what burned. Phosphor?
Anyway, I use hot and flip or gasoline techniques after that and never looked back
I used gasoline to dedome…it didn’t look like this until I used it last night. It ran on high (2.8A) for maybe 20 minutes, not all at the same time though…clicked on and off during a bike ride so it didn’t get REAL hot. I think there was some dome left on there maybe, it wasn’t super flat.
Even a scratch or defect in the surface of the dome can burn like that, it gets extremely hot when running. Something got onto the die while it was hot, or was left on there before it was switched on.
I have one that's dedomed and all was normal for a while, then I upped the current to it and... the phosphor melted. It went slick and shiny like plastic, not the normal 'fluffy' surface of the phosphor after dedoming. Still works nice though. Being so far outside the intended use like this, sometimes things are just gonna happen....
+1
Dedoming the led is conducive to damage and a short life span. There's a reason the led has a dome on it... well more than one reason, but you take your chances when modding. Any tiny defect during dedoming can/will discolor or ruin the phosphor.
Amazing to me that it still works. I’m not really a huge fan of the narrow beam that results but was trying to get more throw. Pretty sure there is residual silicone on there. Should I resoak it?
Magnification + good lighting + toothpick. Very gently, though. Whatever it is may now be stuck to the phosphor stronger than the phosphor is stuck to the die.
Thanks Comfy, I’ll try that….worst case, I replace it with XML2….or XPG2? 