Hey all, hoping to get some advice. I ordered some of the LEDs djozz linked above and a built a 19mm rev5.1 board with them, but it doesn’t work nearly as well as his does in the video. I first built it using a single 22kohm resistor and it was basically a red flashing board, with the colored emitters just dark the rest of the sequence. So I figured maybe it was a power/voltage issue not allowing certain colors to illuminate, so I lowered my resistor to the same 3.3kohm value djozz said he used above, with the biggest difference being that my board only uses 1 for all 6 emitters; its not the 3-channel board. Now my tail has roughly 3 colors, red > green > blue, with some flashing and pulsing in between (maybe there’s supposed to be other colors in there? it almost looks yellowish sometimes.), but after a cycle or two, just a couple of minutes, the blue and green stop working too and I’m back to a board that pretty much just pulses red. Its really not a bad look, the slowly pulsing, undulating red, but its not what I was expecting. If I use turn on the light, cutting power to the tail, it starts over again with multiple colors, but every time, after just a few minutes of working, its down to just red.
Any thoughts? Should I try even less resistance since all 6 are pulling through the 1 resistor? I don’t really want it brighter, but I may have to. Are these just not as good as his original emitters?
As menrioned in my post above I noticed the influence that leds have on each other too, blue is getting scarce if you let it run for a while. My circuit at least has the 3.3kOhm before 2 of the leds parallel, and that 3 times. My interpretation is that the leds have the most influence on the other led directly parallel and less on the other 4 leds. You can also try a separate resistor before each individual led, that may cause the least influence, or one resistor before all 6leds parallel, in which case they all feel each other. Is that last the case in your build?
Yes right now its just got 1 3.3K resistor with all 6 LEDs in parallel afterwards. But the board does have pads for individual resistors. I’ll try rewiring it with separate resistors to see what effect it has.
My tailcap reads 0.64mA at first “connection”, but it fluctuates between 0.4-0.8 as it runs through its cycles.
Could probably also try a lower resistence (for a single resistor setup), right? djozz is using 3x 3.3K vs 1x 3.3K. I imagine that’d make a big difference.
djozz said he was getting around 1ma. So I agree, I would try a lower resistance to start out with. Plus since things improved with 1ma, it might keep improving with lower resistance.
So my next iteration will be a (6.8 Ohm) resistor before each led and see if that will be interesting or boring. Perhaps I hit the most interesting circuitry by accident.
So I rebuilt it using an individual resistor for each led, plus I lowered the value quite a bit too - 1.1k 1.5k per. I know, you should only change one thing at a time when testing but I didn’t have much time. The result is a tailcap that works as expected, shows all colors for at least the last 10 minutes that’s it’s been going, and is WAAAYY too bright. Now it’s pulling between 2.7 and 3.1 mA. So I’ll probably dial a bit more resistance into it when I get a chance, but this is an improvement for now. Thanks all.
EDIT: And I’ve lost the otc on the driver - no long-pressing and next mode memory. Definitely too much current