Hello everyone , Could you please give me explanation for the circuit attached , as you can see its WS2811 LED Driver with 7 resistor (6 for leds , one for VDD ) and one capacitor plus 9 LEDS , i can not understand it .

 

Neither can I, without a datasheet.

Bob

 

https://cdn-shop.adafruit.com/datasheets/WS2811.pdf

Please note the 12v set up. 9 RGB LEDS wired in series 3 groups each.

 

I meant a datasheet for the device you showed, not for the WS2811.

I do not know why it seems to have several extra resistors compared to the WS2811 datasheet application circuits. Other than that, what is it you need to know? Do you understand how the WS2811 is controlled? It is the same as the WS2812 if that helps any.

Bob