Recently I finished building my second version of a photographer’s LED light stick shown below. A couple years ago I built my first LED light stick to experiment with light painting photographic art. See what I did then at:
The second version is longer than the first stick at 64 inches vs. 48 inches, and has more LEDs: 240 vs. 64. Unlike the first version, it uses a 1 MByte SPI Flash memory chip to store images instead of a Flash memory card. The computer board, an Adafruit Flora (Arduino based), sends image data to Adafruit Neopixel Digital RGB LED strips (144 LEDs per meter). The Flora SPI bus reads images from an external Flash memory chip that was previously programmed over Flora’s USB port from a PC.