ECE 477 Design Review Team 14  Spring 2012 Matt Finn Brian Crone Samuel Oshin Yonathan Feleke

Outline Project overview Project-specific success criteria Block diagram Component selection rationale Packaging design Schematic and theory of operation PCB layout Software design/development status Project completion timeline Questions / discussion

Project Overview Future Cash Register Designed to make credit card transactions entirely paperless by using NFC Voice recognition to facilitate orders

Project-Specific Success Criteria Ability to customize the inventory via the user interface (Atom) Ability to communicate with an NFC device (dSPIC30) Ability to interface with an IR sensor to detect the presence of a user (dSPIC30) Ability to display prompts to user through LCD (dSPIC30) Ability to aid cashier by highlighting menu choices while placing order with voice recognition (Atom)

Block Diagram

Component Selection Rationale Microcontroller – dsPIC30F5011 Fast GPIOs SPI ATD UART Memory NFC Controller – NXP PN532 Large memory Cheaper Detailed datasheet SPI interface.

Component Selection Rationale Touch screen – Planar PX2230MW Large screen Great resolution Money to size ratio Interfacing Support. IR sensor – GP2Y0A02YK0F Long range LCD Display – C-51847NFJ-SLW-ADN 80 character Easy to interface Cheap

Packaging Design 7” x 5” x 3”

Packaging Design

Schematic/Theory of Operation

Schematic - Micro

Schematic - IR

Schematic - LCD

Schematic – Voltage Regulator

Schematic – NFC

Schematic – COM Interface

PCB Layout – All Layers

PCB Layout – Bottom Layer

PCB Layout – Top Layer

Software Design/Development Status Customer Present (dsPIC30) IR sensor Polling: 250 ms Voice Recognition (Atom) Google speech to text API Cashier takes order (Atom) C# GUI Finish Order/Pay (Atom) Signal to dsPIC30 Prompt User dsPIC30 to LCD Received Payment? (dsPIC30) NFC through SPI Send to Atom Send Receipt (Atom) Send Receipt to NFC (Micro) Status: Not done on all.

Project Completion Timeline   19-Mar 26-Mar 2-Apr 9-Apr 16-Apr 23-Apr 2-May Wire PCB GUI Application (hello world) (Touchscreen output) (Inventory functions) ("Server" Communication) (Debug) Microcontroller (Heartbeat on PCB) (NFC Communication) Perform Transaction (Basic transaction) PRESENT!

Questions?