The beauty of using Arduino Shields is that they mount piggy back onto the Arduino and the pin assignments are such that you don't lose the functionality of the Arduino board (the stackable female headers make it so that when you plug a wire into the analog or digital inputs on the top board you are effectively plugging into the same pin on the Arduino down below) and generally, for the specific function of the Shield, it is already wired to accept logic from and send logic to the Arduino. So using shields makes things very compact and plug and play.
|The Sea Hawk uses 4 boards for its basic functionality. They fit inside the Otter Box 2500 and leave just enough room for wiring.|
|The second layer of the "sandwhich" for the Sea Hawk is the Arduino Motor Controller, found at Radio Shack. This requires its own 11 to 12 volt power supply to run the motors.|
|The next thing we put on the Sea Hawk stack is a GPS Shield. This enables the Sea Hawk to report where it is as it carries the Sea Perch to its mission location,.|