That’s what I thought when I first read OL’s OP, taskled driver. Maybe series might be the easier and more achievable with 3 amps to each led. The taskled drivers are in a class by themselves, and the price reflects that I guess. I would be for using the HBflex and batteries in series, but I have learned to never under estimate the modding ability of OL. :bigsmile:
I understand. So the 0.6v you measured was between the aluminum and brass contacts on the top of the carrier, right? My money is still on a short on the battery side of the bottom board. You didn’t show how you bridged the contacts, possibly a really high resistance short from that? If you want something to try you could re-assemble the carrier with the two contacts marked below aligned with each other. Cleanup the wiped solder, put springs back on, put the switch back on, and see what you get - you only need to install an 18650 between the marked contacts of course.
If you are checking for a short in the low ohms range on your meter (like 200), switch to a high range (20M or something).
The spots in purple were where I made the bridges, with copper sheet.
I tested each battery one at a time and the two marked in Red showed voltage leakage, but the third one showed correctly, with no voltage with the switch off, so it's got to be something about the two.
OL: are you saying you did that single-cell testing on your initial assembly with the bridges (before tearing it down for pics), or have you re-assembled the carrier at this point?
I do not know, now it works. As I said, I removed the copper film below the areas I marked. All I can think of, if that the current was jumping through the layer somehow, but that's hard to believe. Once I removed the copper under the top coat and put everything back, it works, but I can't give a definite reason for the change. All I did was make sure that there was nothing in the path of the jumpers and nothing close to the spring. That area around the one spring was cleared away, because that pad is smaller than the other two. It was a positive pad and the others were negative. The spring was larger than the pad, but the area around it was coated. It shouldn't have mattered.
LMAO I seriously can’t stop laughing, that is just INSANE!!! Wow, would love to see that in person. Very good work, really hope the owner is happy, I know I would be!
OL, that is insanity! :Sp I love it. Looks like it could double as a BBQ grill. Might want to wear some sunglass while testing, just to be on the safe side.