The first two tutorials are intended to be read in sequence:
The tutorials assume the reader:
Each tutorial presents an example sketch. All the example sketches have 2 to 8 keys and run on a breadboard keyboard.
todo all the tutorial sketches are tested on teensy 2.0 and PCA9655E-D IOE
in July, sketches will be changed to Teensy LC and MCP23018 IOE
You will need a breadboard keyboard with a Teensy 2.0 controller to run the tutorial sketches. If you use a different controller, you may have to change port classes. If you already have a keyboard with an Arduino compatible controller, you can use that instead of a breadboard keyboard.