LED Circle RGB 21 Bits LED NEOPIXEL Compatible WS2812, allows you to access multiple LEDs with a single digital pin by assigning an address to each LED and providing one-wire communication. But unlike simple LEDs, these types of LEDs do not turn on only by applying voltage, they also require a microcontroller.
Each LED is addressable as the driver chip is inside the LED.
Each one has 18mA constant current drive so the color will be very consistent even if the voltage varies, and no external choke resistors are required making the design slim.
Power the whole thing with 5VDC and you're ready to rock.
Outer diameter: 84mm
Inner diameter: 17mm
Shipping list:1PCS* RGB LED Ring WS2812 RGB LED with Integrated Driver