WS2812 5050 RGB LED Ring Lamp Light
1. The rings are 'cascadable' - connect the output pin of one to the input pin of another.
2. Use only one micro controller pin to control as many as you can chain together!
3. Each LED is addressable as the driver chip is inside the LED.
4. Each one has ~18mA constant current drive so the color will be very consistent even if the voltage varies, and no external resistors are required making the design compact.
5. Power the whole ring with 5VDC and you're ready to shine.