Teensyduino is a software add-on for the Arduino, to run sketches on the Teensy and Teensy++! Running Sketches on the Teensy Most programs written for Arduino work on Teensy. All of the standard Arduino functions (digitalWrite, pinMode, analogRead, etc) all work on Teensy. Teensyduino is also compatible with many Arduino libraries. Teensy is not limited to only serial device type. The Tools > USB
