Team 5 – Silver SnakesTechnical Evaluation Content

Communication Speaker SystemFebruary 15, 2012

General System Block Diagram

Block diagram of Ian’s subsystem•Switches activate the PIC which then forwards the command to the LCD module•The driver takes the commands from the PIC and sends it to the display which then outputs it through the screen•If wrong command occurs it can either be visualize by the incorrect display or no display at all

• Program LCD display with PIC24• PIC to interface internal driver on LCD module• Driver forwards commands to the display

• Operate the LCD display with switches• First switch first activation will pause display to

selected category, then second activation outputs desired recording

• Second switch activation will exit any unwanted previous selections

• Interchange category pictures by allowing user to import and store into PIC memory• Can be personal images, clip art, or even from the

Internet

Block Diagram of Matt’s Subsystem•The PIC24E reads the audio files from the flash drive•The PIC sends audio files to the VS1033 to be decoded and converted to analog•The VS sends the analog signal to the ISD4002 to be stored at a particular address•The ISD plays different messages based on the control of the PIC which is coordinated with the cycling of the display

Flow Diagram of Jeff’s Subsystem

Safety

• Ensure that the screen does not cause seizers• Set a wait timer of five seconds before displaying the

next category to avoid repetitive flashing• Display pictures not videos to avoid rapid movement

• Set the brightness to a lower level to evade blinding lights• Keep the total weight to a range under a few pounds• Allow user to rest the system on his/her body• Avoid damages/malfunction when dropped from a

height of a yard or more