I am a New York City Firefighter and I came across this site on google. I am trying to make a map for the firehouse using LEDs and a keypad. What I would like to do is have a keypad set up so when you type in the four digit box number the corresponding LED would light up on the map. There are a little over one thousand box numbers. If anyone can help me out with this project I would appreciate it, or any information to put me in the right direction would be appreciated.