NeoPixel Ring - 24 x 5050 RGB LED with Integrated Drivers

Round and round and round they go! 24 ultra bright smart LED NeoPixels are arranged in a circle with 2.6 (66mm) outer diameter. The rings are

Pololu - Adafruit 24-LED NeoPixel Ring

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NeoPixel Ring - 32 X 5050 RGB LED With Integrated Drivers, LSC-RING -32LEDS-5V

24 Bit Ws2812 5050 Rgb Led Built-in Full Color Driving Lights Circular Neo Pixel Ring at Rs 369.00, Khordha, Bhubaneswar

NeoPixel Ring - 16 x 5050 RGBW LEDs w/ Integrated Drivers - Natural Wh — Little Bird

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NeoPixel Ring - 16 x WS2812 5050 RGB LED with Integrated Drivers - CRCibernética

This is a Neopixel technology ring with 12 RGB LED diodes that can be individually controlled, each of which can produce 256 shades of its own color, resulting in a total of 16,777,216 colors. The data channel for communication is a One-Wire serial type and can be controlled with microcontrollers such as Arduino, PIC, mbed, etc. You can set the refresh frequency as desired, so as to make certain light effects imperceptible. Multiple rings can be cascaded together to create various effects.

Arduino Ring with 12 RGB WS2812 LEDs and Integrated Driver TPX00172