ECE 477 Final Presentation Team 13 Spring 2008

ECE 477 Final Presentation ECE 477 Final Presentation Team 13 Team 13 Spring 2008 Spring 2008 Varun Srichand Anvesh Madhu

OutlineOutline

• Project overviewProject overview

• Block diagramBlock diagram

• Design challengesDesign challenges

• Project demonstrationProject demonstration

• Individual contributionsIndividual contributions

• Questions / discussionQuestions / discussion

Project OverviewProject Overview

• An ordering system where the user will be An ordering system where the user will be able to order and pay for the food from the able to order and pay for the food from the comfort of the tablecomfort of the table

• Consists of a touch screen monitor which Consists of a touch screen monitor which displays the menu and allows the user to displays the menu and allows the user to select the itemsselect the items

• The order sent through a wireless interface is The order sent through a wireless interface is received by the host computerreceived by the host computer

• The bill can be paid at the table using an The bill can be paid at the table using an RFID gift cardRFID gift card

Block DiagramBlock Diagram

Design ChallengesDesign Challenges

• Adding the battery circuitAdding the battery circuit– Huge changes in schematicHuge changes in schematic– Completely new PCB layoutCompletely new PCB layout

• Building and testing the charger circuitBuilding and testing the charger circuit– An error in initial circuitAn error in initial circuit– Mismatch of PCB footprintMismatch of PCB footprint

• Testing the functionality of the Battery Testing the functionality of the Battery monitoring circuitmonitoring circuit– I2C interfaceI2C interface

Design ChallengesDesign Challenges

• Carefully designing and populating the PCB Carefully designing and populating the PCB to avoid damageto avoid damage– Many expensive partsMany expensive parts– Damaged the wireless transceiver twiceDamaged the wireless transceiver twice

• PCB LayoutPCB Layout– Learn Layout PlusLearn Layout Plus– Revise the layout twiceRevise the layout twice

Project DemonstrationProject Demonstration

1.1. An ability to display information (menus, An ability to display information (menus, items ordered, etc.) on an LCD.items ordered, etc.) on an LCD.

2.2. An ability to enter choices and select An ability to enter choices and select functions via touch screen entry.functions via touch screen entry.

3.3. An ability to read an RFID card and use An ability to read an RFID card and use decoded user ID to look up personal decoded user ID to look up personal account information.account information.

4.4. An ability to transmit menu choices over a An ability to transmit menu choices over a  wireless interface wireless interface

5.5. An ability to charge the batteries using a An ability to charge the batteries using a charger circuit. charger circuit.

PSSC DemoPSSC Demo

Demonstration Video

Individual ContributionsIndividual Contributions

• Team Leader – Anvesh DasariTeam Leader – Anvesh Dasari• Team Member 2 – Srichand YellaTeam Member 2 – Srichand Yella• Team Member 3 – Varun VallabhaneniTeam Member 3 – Varun Vallabhaneni• Team Member 4 – Madhu TummalaTeam Member 4 – Madhu Tummala

Team Leader – Anvesh DasariTeam Leader – Anvesh Dasari

• Researched ZigBee Transceiver and Battery Researched ZigBee Transceiver and Battery ChargerCharger

• Designed the circuit for Battery chargerDesigned the circuit for Battery charger• Interfacing Battery Fuel Gauge and Touch Interfacing Battery Fuel Gauge and Touch

screen to Microcontrollerscreen to Microcontroller• Software coding for MicrocontrollerSoftware coding for Microcontroller• Hardware DebuggingHardware Debugging

Member 2 – Srichand YellaMember 2 – Srichand Yella

• Researched on touch screens and Battery Researched on touch screens and Battery Fuel GaugeFuel Gauge

• Designed the circuit for the fuel gauge and Designed the circuit for the fuel gauge and the wireless transceiverthe wireless transceiver

• Designed the PCB layoutDesigned the PCB layout• Developed the touch screen graphicsDeveloped the touch screen graphics• Wrote the code for host computerWrote the code for host computer• Debugged the hardwareDebugged the hardware

Member 3 – Varun VallabhaneniMember 3 – Varun Vallabhaneni

• Researched on components such as the Researched on components such as the RFID reader and level translatorRFID reader and level translator

• Designed the schematic for microcontroller, Designed the schematic for microcontroller, RFID readerRFID reader

• PCB LayoutPCB Layout• Hardware testing of the RFID reader and Hardware testing of the RFID reader and

battery charger circuitbattery charger circuit• Packaging of the devicePackaging of the device

Member 4 – Madhu TummalaMember 4 – Madhu Tummala

• Researched LDOsResearched LDOs• Designed circuit for LDOsDesigned circuit for LDOs• Interfacing ZigBee Transceiver and RFID Interfacing ZigBee Transceiver and RFID

reader to Microcontrollerreader to Microcontroller• Programming Microcontroller using code Programming Microcontroller using code

warriorwarrior• PackagingPackaging

Questions / DiscussionQuestions / Discussion