I used an Arduino mini Pro (3.3V – 8MHz) from sparkfun and interfaced with Adafruit’s Neopixel Ring LEDs. A lithium ion battery (3.7V) was used for power supply. Everything was placed inside the cap.
Featured Adafruit Product!
NeoPixel Ring – 24 x 5050 RGB LED with Integrated Drivers: Round and round and round they go! 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!
(read more and see our full selection of NeoPixel Rings)
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