This project demonstrates a cool morse code translator that will transmit both a light and sound signal. As you type words into your computer, the LED and buzzer will signal the respective morse code letters. Although it may seem relatively complex and expensive, all components are available for low prices online or at an electronics/hobby store. The "brains" are provided by a basic Arduino micro controller and although some introductory programming is involved, this project is quite straightforward. (As far as code, all you have to do is copy and paste my example code and run the application, so never fear.)
Step 1: Materials
Arduino Uno micro controller (x1)
USB A to B cable (commonly used in printers)
Any color LED (x1) (I use red in the project)
Solid core #22 guage jumper wire (approximately one foot)
Access to a computer
Free Arduino software IDE installed on the computer--- make sure to download the correct program for you operating system. (Link to download page: http://arduino.cc/en/Main/Software )
Step 2: Install the software
Step 3: Link-up!
Click on the "tools" button in the toolbar and hover over "board", Make sure your particular model of controller is checked, then select the serial port under "Serial Port". It should be prefixed by /dev/tty.usbmodem/.
See screenshots if you don't understand.