Provides an SPI interface to Adafruit TLC5947 PWM LED driver module(s) via the "standard base shield connector". Each module controls 24 LED segments, thus up to 8 RGB LEDs. A dozen or more modules can be daisy-chained. Standard LEDs can be directly controlled. High power 3 watt LEDs (visible in bright sunlight at 150' or more) can be controlled with an extension board (see the LEDMaster for more info on this aspect)
