Has anyone else had issues driving strings of ws2812 LEDs from raspberry pi GPIO ports via a CD5050 chip for level conversion to +5v? Setup Power injection is done at the start of each string. Wire is 4 core alarm for data, 6 core (3 cores +ve, 3 cores -ve) for power. 3 strings of 150 LEDs are connected end to end. 70A 5v PSU On the table with all the wires twisted together there were no issues providing I used the 5V from the LED power supply on the CD5050 chip. This was even with the power supply grounds (-ve) connected together. Strange but I can get over it. Thought I had better tidy the installation up and ordered some 4 core (22awg) pigtails from eBay and connected up the data wire only. Now my issue is the signal looks like crap (noise, distortion, slow rise times) on a scope, no LED control / massive flickering / incorrect colors. To get one string working I have paired up three of the six CD5050 buffers to drive one string. Second and third strings remain uncontrollable. The data signal degrades (on the scope) as soon as the patch cable is connected without the LEDs. The data signal gets worse as more LED strings are connected. Any thoughts???????