NeoPixel LEDs use 800 KHz protocol so specific timing is required. On NeoPixels, the PWM rate is ~400 

Hz, which works well but is noticable if the LED is moving. In comparison, DotStars have a 20 KHz PWM 

rate, so even when moving the LED around, you won't see the pixelation, the blending is very smooth. 

(we recommend DotStars if you can use them) 

NeoPixels are 5050-sized LEDs with an embedded microcontroller inside the LED . You can set

the brightness and color of each R/G/B/W with 8-bit PWM precision (so 32-bit color per pixel).

The LEDs are controlled by shift-registers and only 1 digital output pin are required to send data

down. The PWM is built into each LED-chip so once you set the color you can stop talking to the

ring and it will continue to PWM all the LEDs for you.

We have a tutorial showing wiring, power usage calculations, example code for usage, etc. for NeoPixel 

Please check it out! Please note you will need a NeoPixel library with RGBW support which is not always 

available. If you try to control these with a plain 'RGB' NeoPixel library, you'll get very weird results. Our 

Adafruit NeoPixel library does support RGBW but if you're using something else, just be aware that it 

might require some hacking.

Our detailed NeoPixel Uberguide has everything you need to use NeoPixels in any shape and size. 

Including ready‐to‐go library & example code for the Arduino UNO/Duemilanove/Diecimila, 

Flora/Micro/Leonardo, Trinket/Gemma, Arduino Due & Arduino Mega/ADK (all versions)

Comes with one quarter ring of 15 x individually addressable RGB LEDs assembled and

tested. We recommend you buy four to build the full circle as this is just the 1/4 of the circle.

Technical Details

Outer diameter of full circle (four put together): 157mm / 6.2"

Inner diameter of full circle (four put together): 145mm / 5.7"

Thickness: 3.25mm / 0.13"

Weight of one individual quarter: 4.1g

Engineered in NYC Adafruit ®