Adafruit NeoPixel Jewel - 7 x WS2812 5050 RGB LED with Integrated Drivers

Be the belle of the ball with the NeoPixel Jewel!
Seven tiny 5050 (5mm x 5mm) smart RGB LEDs fit onto a beautiful, round PCB with mounting holes and a chainable design to create possibly the most elegant (and evening-wear appropriate) NeoPixel board yet.

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 and you're ready to rock.

The LEDs are 'chainable' by connecting the output of one Jewel into the input of another. There is a single data line with a very timing-specific protocol. Since the protocol is very sensitive to timing, it requires a real-time microconroller such as an AVR, Arduino, PIC, mbed, etc. It cannot be used with a Linux-based microcomputer or interpreted microcontroller such as the netduino or Basic Stamp. Adafruits wonderfully-written Neopixel library for Arduino supports these pixels! As it requires hand-tuned assembly it is only for AVR cores but others may have ported this chip driver code so please google around. An 8MHz or faster processor is required.Comes as a single round board with 7 individually addressable RGB LEDs assembled and tested.Adafruits 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)