I thought I saw some of them use four wires, so assumed there was a return path from the bottom of the strand back up to the top of the next strand.
I had also suspected they use standard WS2811 RGBIC strands like https://www.aliexpress.us/item/3256804447608449.html and have a small chip in each tee-junction that sends Din down the strand but strips off the first 480 pulses (8bit/color * 3color/pixel * 20pixel/strand) before sending it over to the next tee. I've been exploring making something that does that using a CMIC or µC.
I just got a few 200-LED fairy strings, and now I'm wondering if I have standard RGBICs or what they're calling CDPs.
I thought I saw some of them use four wires, so assumed there was a return path from the bottom of the strand back up to the top of the next strand.
I had also suspected they use standard WS2811 RGBIC strands like https://www.aliexpress.us/item/3256804447608449.html and have a small chip in each tee-junction that sends Din down the strand but strips off the first 480 pulses (8bit/color * 3color/pixel * 20pixel/strand) before sending it over to the next tee. I've been exploring making something that does that using a CMIC or µC.
I just got a few 200-LED fairy strings, and now I'm wondering if I have standard RGBICs or what they're calling CDPs.