When I try to do some simple test code to light up the leds sequentially, I get really inconsistent behaviour. Sometimes it'll skip, sometimes it'll light up two at once, etc. Added a 330 resistor to the rbo/rdo like I saw suggested online, but it hasn't really made a noticeable difference. Using a benchtop power supply and I'm seeing 24V throughout the strip's 24V line.
(I'm basically just using some sample code from the FastLED examples.)
// Use if you want to force the software SPI subsystem to be used for some reason (generally, you don't)
// #define FASTLED_FORCE_SOFTWARE_SPI
// Use if you want to force non-accelerated pin access (hint: you really don't, it breaks lots of things)
// #define FASTLED_FORCE_SOFTWARE_SPI
// #define FASTLED_FORCE_SOFTWARE_PINS
#include <FastLED.h>
//
// Move a white dot along the strip of leds. This program simply shows how to configure the leds,
// and then how to turn a single pixel white and then off, moving down the line of pixels.
//
// How many leds are in the strip?
#define NUM_LEDS 4
// For led chips like WS2812, which have a data line, ground, and power, you just
// need to define DATA_PIN. For led chipsets that are SPI based (four wires - data, clock,
// ground, and power), like the LPD8806 define both DATA_PIN and CLOCK_PIN
// Clock pin only needed for SPI based chipsets when not using hardware SPI
#define DATA_PIN 3
#define CLOCK_PIN 13
// This is an array of leds. One item for each led in your strip.
CRGB leds[NUM_LEDS];
// This function sets up the ledsand tells the controller about them
void setup() {
// sanity check delay - allows reprogramming if accidently blowing power w/leds
delay(2000);
// Uncomment/edit one of the following lines for your leds arrangement.
// ## Clockless types ##
// FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS); // GRB ordering is assumed
// FastLED.addLeds<SM16703, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<TM1829, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<TM1812, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<TM1809, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<TM1804, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<TM1803, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<UCS1903, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<UCS1903B, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<UCS1904, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<UCS2903, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<WS2812, DATA_PIN, RGB>(leds, NUM_LEDS); // GRB ordering is typical
// FastLED.addLeds<WS2852, DATA_PIN, RGB>(leds, NUM_LEDS); // GRB ordering is typical
// FastLED.addLeds<WS2812B, DATA_PIN, RGB>(leds, NUM_LEDS); // GRB ordering is typical
// FastLED.addLeds<GS1903, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<SK6812, DATA_PIN, RGB>(leds, NUM_LEDS); // GRB ordering is typical
// FastLED.addLeds<SK6822, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<APA106, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<PL9823, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<SK6822, DATA_PIN, RGB>(leds, NUM_LEDS);
FastLED.addLeds<WS2811, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<WS2813, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<APA104, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<WS2811_400, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<GE8822, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<GW6205, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<GW6205_400, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<LPD1886, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<LPD1886_8BIT, DATA_PIN, RGB>(leds, NUM_LEDS);
// ## Clocked (SPI) types ##
// FastLED.addLeds<LPD6803, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS); // GRB ordering is typical
// FastLED.addLeds<LPD8806, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS); // GRB ordering is typical
// FastLED.addLeds<WS2801, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<WS2803, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<SM16716, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<P9813, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS); // BGR ordering is typical
// FastLED.addLeds<DOTSTAR, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS); // BGR ordering is typical
// FastLED.addLeds<APA102, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS); // BGR ordering is typical
// FastLED.addLeds<SK9822, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS); // BGR ordering is typical
delay(2000);
// Turn our current led on to white, then show the leds
}
// This function runs over and over, and is where you do the magic to light
// your leds.
void loop() {
// // Move a single white led
// for(int whiteLed = 0; whiteLed < NUM_LEDS; whiteLed = whiteLed + 1) {
// // Turn our current led on to white, then show the leds
// leds[whiteLed] = CRGB::White;
// // Show the leds (only one of which is set to white, from above)
// FastLED.show();
// // Wait a little bit
// delay(1000);
// // Turn our current led back to black for the next loop around
// leds[whiteLed] = CRGB::Black;
// }
leds[3] = CRGB::Black;
leds[0] = CRGB::White;
FastLED.show();
delay(500);
leds[0] = CRGB::Black;
leds[1] = CRGB::White;
FastLED.show();
delay(500);
leds[1] = CRGB::Black;
leds[2] = CRGB::White;
FastLED.show();
delay(500);
leds[2] = CRGB::Black;
leds[3] = CRGB::White;
FastLED.show();
delay(500);
}