Tutorial 2 - single-layer keyboard
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The easiest way to learn the keyboard library is to read some simple sketches.
[keybrd_2_single-layer_annotated.ino](keybrd_2_single-layer_annotated/keybrd_2_single-layer_annotated.ino) is a simple sketch with annotations that explain how a keybrd sketch works.
The sketch will run on the basic breadboard keyboard described in [tutorial_1_breadboard_keyboard.md](tutorial_1_breadboard_keyboard.md)

![basic breadboard keyboard](keybrd_1_breadboard_images/breadboard_keyboard_2x2.JPG "basic breadboard keyboard")

Class definitions can be viewed in the [keybrd library](../src/).
After reading the sketch you will be able to modify it to suite your own single-layer keyboard design.

## Exercises
1) Add a third column to the breadboard keyboard and sketch.

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