I am currently working on a Arduino / Raspberry Pi project, where I am trying to drive a line of 64 PL9823 LEDs which are said to be equivalent to the popular WS2812 LEDs. Datasheet: http://www.adafruit.com/datasheets/WS2812.
Everything just works fine, but from time to time the first LED in line seems to break (i.e. stays dark) and keeps the data signal from reaching the subsequent LEDs. It seems that this mainly happens when powering on the LED matrix.
Do you have any idea what could be the reason for this and how it could be prevented? I have already thought about voltage spikes that occur when powereing on the power adapter, but am unsure about how to implement a safety feature.