Nowadays ,as APA104 ,APA102 build in ic led chip is design by us , ws2812b ,ws2812s is not as popular as before , but Many people even don't know  the difference between ws2812b and ws2812s. So let us to tell you the difference

         In fact ,both of ws2812b and ws2812s is build in ic . use ws2811 ic to be the driver , so where are the difference ? WS2812b have 4 legs, ws2811 have 6 legs, 

the following picture is about them . 

WS2812B

WS2812

But now APA102 APA104 Will replace ws2812b ws2801 ws2812s soon