I just fried a dedomed xpg2 (I hope it was just the LED….). I spent the last few hours modding a UF-1508 aspheric with a dd xpg2 and a 5.5A MTNMAX driver. The 1508 has a bit of an odd pill and a threaded parabolic piece that screws down onto the mcpcb. After several failed attempts at getting the LED leads soldered flat enough I switched over to flat copper sheet. It worked eventually, just a pain to work with such tiny pieces of metal. So I screw down the securing piece to secure the mcpcb and I think to myself “don’t forget to pull this back off before testing”……… I hook up the driver pop in two cells and a flash of light followed by utter disappointment as I instantly realized my mistake. :person_facepalming:
I put a stacked resistor on an L2 and forgot about reflector clearance when soldering the leads back in, shorted it and fried the driver. I did have Kapton tape on the base of the reflector, but it tore. I’ll be happier with the Bistro driver anyway… Still, was hoping to find out what the stock driver was capable of.
Well I for one am extremely proud of myself. I stacked some chips!
I have never been able to stack chips. I’m a pretty good solderer, but stacking chips has always been disastrous. I have stacked one chip before, but trying to stack a second chip always turned into the ruin of me. Every once in a while I give it a go until I ruin a perfectly good Qlite, and give up.
I have a triple deep red rebel mod coming up, and need between 4A-4.5A, so I got out another driver and managed to stack four 380 7135 chips. Maybe my confidence has improved?
It’s an ugly looking mess, but everything has continuity, and nothing got bridged. It’s that little leg in the center that always gave me grief, so I just cut it off.
I haven’t tested it yet. It should be okay, but I’m afraid if it ends up not working, I’ll break into tears. Tomorrow.
This is it. Please don’t laugh.
Thanks Steve.
One chip gave me so much trouble. I couldn’t get continuity no matter how hard I tried, until I realized my DMM had timed out and turned itself off. Stupid.
That’s the problem. I never try to solder it, but it’s so close to the other two legs I always ended up bridging to it. Just cutting the darn thing off and getting it out of the way sure made it easier.
I modified my brand new Trustfire TR-J20. Very successful resistor mod, I turned it from a 4285 lumen beasty into a black hole battle ax.
Fried the driver. I calculated the 2 R620 and 1 1R5 sense resistors to be ~.2625 total resistance. Jumped right on it and removed the 3 originals soldered an R025 on there. Didn’t catch on til I volcano erupted a large MOSFET on the driver that I could even hear through the thick construction.
Yep, I have DUMBA$$ tatooed on every bone in my body.
I’m not sure what relics mod was.
It has a new switch end and a new end for the power to the driver. I used single sided breadboard but it would of been a lot better and easier with double sided breadboard.
I’ll post some pictures up tomorrow if I have time.