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

2. 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

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

4. 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)

5. Block Diagram

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

7. 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

8. Packaging Design
7” x 5” x 3”

9. Packaging Design

10. Schematic/Theory of Operation

11. Schematic - Micro

12. Schematic - IR

13. Schematic - LCD

14. Schematic – Voltage Regulator

15. Schematic – NFC

16. Schematic – COM Interface

17. PCB Layout – All Layers

18. PCB Layout – Bottom Layer

19. PCB Layout – Top Layer

20. 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.

21. 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!

22. Questions?