Make a 3D Printed Camera LED Ring @ the Adafruit Learning System. Turn a 24x NeoPixel ring into a light for a DSLR camera –
Trying to get those pixel perfect macro shots on a budget? Build your own DIY low cost ring of light with a NeoPixel Ring and Trinket, Adafruit tiny arduino micro controller. The color and brightness of the LEDs can be programmed to color or pattern!