Religiones

The VOIP Telephone Project
“The Wichita Project”

Senior Project Final Report

Design Team #4 Wyatt Mann Joe Pachuta Drake Smith

Dr. Okechukwu C. Ugweje

May 3, 2006

Table of Contents Table of Contents…………………………………………………………………………..i List of Figures……………………………………………………………………………..ii List of Tables……………………………………………………………………………..iii Abstract…………………………………………………………………………………...1Introduction…………………………………………………………………………….....2 Statement of Need………………………………………………………………...2 Problem Definition: Goals, Objectives…………………………………………...2 Problem Definition: Constraints………………………………………………….3 Design Requirements……………………………………………………………....……..4 Accepted Technical Design................................................................................................6Hardware.................................................................................................................6 Software.................................................................................................................15 Testing Procedures.............................................................................................................21 FinancialBudget................................................................................................................27 Project Schedule.................................................................................................................30 Design Team Information..................................................................................................34 Conclusions andRecommendations..................................................................................35 References..........................................................................................................................36 Appendix A—Final Source Code……………………………………………………….37

i

List of Figures Figure 1: USB Port to PCB..................................................................................................6 Figure 2:D/A and Microchip Connections.........................................................................6 Figure 3: Final Schematic....................................................................................................8 Figure 4: Final PCB...........................................................................................................12 Figure 5: PlasticEnclosure................................................................................................13 Figure 6: Rear View, Plastic Enclosure.............................................................................14 Figure 7: Combined Flow Chart for Microcontroller........................................................19 Figure 8: Flow Chart forinitialization...............................................................................18 Figure 9: Analog to Digital Converter Flow Chart............................................................20 Figure 10: Digital to Analog Converter Flow Chart..........................................................21 Figure 11: Gantt Chart for Design Semester......................................................................31 Figure 12: Gantt Chart forAnticipated Implementation....................................................32 Figure 13: Gantt Chart for Actual Implementation............................................................33

ii

List of Tables Table 1: Pin Connections between microcontroller and LCD...........................................10 Table 2: RJ11 ConnectionPins..........................................................................................11 Table 3: USB Files and Functions.....................................................................................16 Table 4: Estimated Labor Cost..........................................................................................27 Table 5: Anticipated Material Cost....................................................................................28...