WS2812 RGB LED Ring
This is an RGB LED ring with 16 pcs of WS2812 Chainable& Addressable LED. Use only one microcontroller pin to control as many as you can chain together! 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.