that is what i thought at first, but no, continuity test showed no short. i hope it is my dmm that is the issue, will test tonight, i already borrowed another dmm, and have spare batteries.
leds do work, i run them off an unprotected cell and they light up and stay lit. protected cell however trips the pcb. but that i can believe, 6 leds, that are less than 3v, powered directly by a healthy cell that is at about 4v can pull over 6A which is what pcb in the cell is approx. rated at. but 10A with several different drivers, and cells, idk, some cells i tried cannot physically put out 10a.
the problem was my DMM’s battery, i replaced it and no more OL. on a half drained cell, or more, i had 4,5, at 3.7v under load, it took about 30-40min to get to 3v. since a poster before mentioned about temp, i ran leds to see how hot it’ll get, well it did not, it was pretty warm but not too hot. granted the cell was not fully charged, but i have no doubts even with fresh cell, 10-15W will not heat up the heatsink to a dangerous numbers. 9A however will, and pretty fast. so with no 9A driver no need for thermal switch,
originally i was gonna install 2 drivers, 4,5 and 9A. when the heatsink would get too hot a thermal switch would shut off either both drivers, or just 9A driver. even if both drivers would be off, i would still have white light in rgbw group, but only about 3W. or if i only wire 9A driver to the thermal switch, i’d have 4,5A. but now i’m thinking to abandon that plan, and instead use a driver that maxes out at 3.5A. i have drivers made by Quadrupel. they are D10 drivers, fet+1 iirc, with anduril UI. the driver fits under a 16mm switch boot just right, only few mm thick, has many different modes. has built in switch, all i need to do, is design and print a housing for the switch boot and a driver, and install it where i originally wanted to install a DT switch, so i will have 1 DT switch, and 1 pushbutton. which also has leds to light up the boot.
here is a pic i took while testing, caught a moment when current and voltage matched, lol
thanks. it depends on uv and on lenses, polycarbonate wont pass anything below 400-405nm, pmma around 380nm.
i have ledil triple tir made from pmma. and 400nm uv led,