http://www.youtube.com/watch?v=sbKjKKVewDU

Tutorial:
http://learn.adafruit.com/3d-printed-camera-led-ring

Want to take pixel-perfect macro photos on a limited budget? Why not do it yourself with a camera? NeoPixel ring-shaped LED strip lightMatchingTrinket——This compact Adafruit Arduino microcontroller—create your own low-cost DIY ring-shaped fill-in light. The color and brightness of the LEDs can be customized through programming, allowing you to switch between colors or create dynamic patterns at your convenience!

将 24 NeoPixel ring-shaped LED stripsUsing it as a ring fill-in light is an excellent solution to enhance the effect of macro photography. The ring light can create a spotlight effect, effectively eliminating the shadows caused by the camera blocking the subject. In the test samples above,NeoPixel ring-shaped LED strip lightA soft ring of light is projected inside the lens, adding a unique layer of light and shadow to the image.