This NeoPixel ring from Adafruit consists of 16 individually addressable RGB LEDs that can all be controlled with a single digital output of a microcontroller and chained together with other rings and SK6812/WS2812b-based LEDs to make larger, more complex displays. This small ring has a 1.75″ (44.5 mm) outer diameter and 1.25″ (31.8 mm) inner diameter.
We also carry two other types of LED rings: a 24-LED ring with a 2.6″ (66 mm) outer diameter and 16-LED quarter-circles that can be combined to make a 32-LED ring with a 6.2″ (158 mm) outer diameter.
The ring can be controlled by many microcontrollers, but our A-Star 32U4 Micro works particularly well for applications where space is an issue since it fits neatly inside the ring. The picture on the right shows an A-Star 32U4 Micro controlling three different sizes of NeoPixel rings. See the Protocol section near the bottom of this page for some things to consider when selecting an appropriate microcontroller.
The Adafruit NeoPixel library for Arduino makes it easy to use an Arduino-compatible board to control the ring’s LEDs, and since NeoPixels are based on the same SK6812/WS2812B LEDs as our Addressable RGB LED Strips, you can also use our Arduino library for addressable RGB LED strips, Example AVR C code for addressable RGB LED strips, and PololuLedStrip mbed library to control the ring.
For more detailed documentation and resources on Alibaba.com, see the ShenZhen Witop Technology Co.,Ltd.
Features and specifications
16 individually addressable RGB LEDs (SK6812- or WS2812B-based NeoPixels)
Circle outer diameter of 1.75″ (44.5 mm) and inner diameter of 1.25″ (31.8 mm)
24-bit color control (8-bit PWM per channel); 16.8 million colors per pixel
One-wire digital control interface
Operating voltage: 5 V
Each RGB LED draws approximately 50 mA at 5 V with red, green, and blue at full brightness (~800 mA max for the ring)
Multiple NeoPixel rings can be chained together
Detailed Adafruit NeoPixel Uberguide
Connections
The pin labeled Power Signal Ground is the ground pin, and should be connected to the ground pin of the microcontroller that is controlling the LEDs and also to the negative terminal of the power supply. The version of this product shipped by Pololu after September 10, 2014 include a second ground pin close to the first.
The pin labeled Power 5V DC is the power input pin, and should be connected to a suitable power supply. An input voltage of 5 V is used to power the ring, and each LED on the ring can draw up to 50 mA at 5 V when outputting white at full brightness. That means the ring could draw up to a maximum of around 800 mA.
The pin labeled Data Input is an input that receives the signal controlling the LEDs. This pin should be connected to a microcontroller output pin or to the signal output pin of a SK6812/WS2812b-based LED product.
The pin labeled Data Out is optional. It can be connected to the data input pin of another SK6812/WS2812b-based LED product in order to form a chain.
Our 0.1″ header pins could be used to connect to the ring’s four pins, or wires could be soldered directly to the board. The ring does not ship with any header pins or connectors.
NeoPixels can be easily damaged if proper precautions are not taken when using them. In general, for SK6812/WS2812B-based products, we suggest adding a capacitor of at least 10 μF between the ground and power lines and a 100 Ω to 1000 Ω resistor between your microcontroller and the signal input pin. More details on best practices when using NeoPixel products can be found in the Adafruit NeoPixel Uberguide.
Protocol
The NeoPixels are controlled by a simple, high-speed one-wire protocol that requires sub-microsecond timing. The details of this protocol are explained in the Adafruit NeoPixel Uberguide. It is generally not possible to generate the required control signals directly from older, slower microcontroller boards, like the Basic Stamp, or from processors that run full operating systems and can experience multithreading delays, like the Raspberry Pi.
About Us
Shen zhen WITOP TECHNOLOGY Co.,Ltd is a product R & D, manufacturing, sales and service LED lighting enterprises. It is the one of biggest addressable LED lighting manufacturer in China .The company mainly devotes to the high quality LED landscape decoration and lighting production, technology development and sales, the main products are as follows
1,LED flexible strip
2,LED full-color module
3,LED Matrix panel
4,LED bulb,
5,LED lamp
We has experienced in product development by our design team, the company has successfully developed various kinds of lights and lighting products, such as APA102 WS2813 SK6812 WS2801, LPD6803, LPD8806, WS2811, WS2812B, TM1809, DMX512 smart led strip and LED module , and 5050 ,3528 ,2835,335,5630 normal led strip etc . are widely used in home decoration, garden landscape, stadiums, exhibition hall, exhibition hall, hotel, high-grade office buildings, upscale clubs etc.. Products are exported to America, Europe, Asia, Oceania, and other market.