Adafruit NeoPixel Ring - 16 x RGB

The NeoPixel Ring has 16 ultra bright smart LED NeoPixels that are arranged in a circle with 1.75" (44.5mm) outer diameter. The rings are 'chainable' - connect the output pin of one to the input pin of another. 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. Power the whole thing with 5VDC (4-7V works) and you're ready to rock. Key Features Dimensions: 44.5mm / 1.75" outer diameter. 31.75mm / 1.25" inner diameter. 2.5mm / 0.1" thick. Weight: 3.03g Comes as a single ring with 16 individually addressable RGB LEDs assembled and tested. User Guide / Documentation Neopixel library for Arduino