Countdown

A small countdown program for a custom shield comprising:

• Adafruit 8x8 bicolor led matrix (http://www.adafruit.com/products/902)
• A piezo buzzer
• 2 push buttons

Used libraries:

• https://github.com/adafruit/Adafruit-LED-Backpack-Library
• https://github.com/adafruit/Adafruit-GFX-Library

Setup

1. Download the Arduino environment for your platform from http://arduino.cc/en/Main/Software
2. Download the AdaFruit LED Backpack library from github as a ZIP file. Uncompress it and rename the folder Adafruit_LEDBackpack. Check that the folder contains Adafruit_LEDBackpack.cpp and Adafruit_LEDBackpack.h. Move the library folder to your arduinosketchfolder/libraries/ folder (you may need to create the libraries subfolder if its your first library. Alternatively, you can import the library using the item Import Library... from the Sketch menu.
3. Download the AdaFruit GFX library, rename to Adafruit_GFX and proceed as above for installation.