DIYmall 7 Bits 7 X WS2812 5050 RGB LED Ring Lamp Light with Integrated Drivers Voltage:DC4-7V Communication interface:Single-wire communication LED Chip:WS2812B UNO R3 5V WS2812 to 5V; UNO R3 pin 6 to WS2812 Data input; UNO R3 GND to WS2812 GND You can refer Adafruit website