Hi all, i'm working on a arduino-based clock hack and I am using the TLC5940 to control some leds.
Starting small, I used just one of the constant current driver chips and a single LED. Following the datasheets, timing diagrams, and example code from the library http://www.arduino.cc/playground/Learning/TLC5940
, I breadboarded a circuit with a single LED. My wiring was checked several times and I used my handy dandy logic analyzer to confirm that the arduino was providing correct outputs. The chip is sinking (or the schematic has it sinking) current as the chip is intended to do. Any ideas of what I may have goten wrong?