# Tlc5940 Library 16 channel PWM LED driver based on the Texas Instruments TLC5940 chip. http://www.pjrc.com/teensy/td_libs_Tlc5940.html http://code.google.com/p/tlc5940arduino/ http://playground.arduino.cc/Learning/TLC5940 https://github.com/PaulStoffregen/Tlc5940 ![Tlc5940 with Teensy 2.0](http://www.pjrc.com/teensy/td_libs_Tlc5940_1.jpg) The TLC5940 chip SCK pin is sensitive to signal overshoot. When used with Teensy 4.0 or other high speed hardware, especially if using long wires, you may need to add a resistor inline with the SCLK signal. https://forum.pjrc.com/threads/71009?p=323766&viewfull=1#post323766