I have to say that is some pretty kick ass micro soldering! I never thought about creating isolated “power packs” to drive each individual LED - great idea! Instead I just sandwiched 3 boards together (1 master, 2 slave) to power 3 LEDs (granted to run an XM-L having 8 x 7135 stacks would probably take up more room).
Some of you guys out there blow me away with some of the mods you do and this one, what do I say. The electronic side of it makes fascinating viewing but I havent got a clue what any of it means, stacking things and other, stuff. Love it.
I've had trouble stacking 7135's and getting the light not to flicker, described in post #51 of this thread. I tried making a "linger special" with 2 XML's soldered in parallel onto the same PCB and driving with a 12 x 7153 chips. It was pulling ~ 4.2A (2.1A per LED), but the problem was I was getting flickering issues on all modes (high, med, low). I checked all connections and everything seemed to be visually ok, but it's hard to tell with the micro soldering. I was running with 1 x 18650, but also tried 4 x NiMh C cells. Less flickering on the C's, but was still not perfect.
The suggestion was made that I might not be getting good electrical connection at either the AMC 7135 stack solder joints, or where the 2 x XMLs were reflowed. No flickering issues with an unmodified 2.8A board, but output was not impressive.
If I could solve the flickering issue, I would be very happy.
Hill - You have a problem with a soldering connection or one of the driver components. If the output
is very low you may want to re-solder the drive and leads and recheck all the components.
Output seems to be fine on all modes except for intermittent flickering. Aside from starting again with a new board and loose AMC 7135 chips, I don’t know what else to do here. Maybe a need a better iron with a very fine solder tip.
the LED is operating at low voltage and its intermittent.And its well insulated from the pill and reflector
Whats the power source? Looks like your using silicone wire….Just to amuse myself here …Its electrical
solder your using? Should have some flux and preferably high silver content? If its thick enough to write with……Hmmm…
l
