Comprehensive Design Review

Team Tessier:Brandon Thorpe

Lucas RootMichael Shusta

Telin Kim

Outline

• CDR Deliverables

• System Overview

• User Interface and Database Integration

• Embedded Programming

• PCB and Housing Design

• FPR Goals

CDR Deliverables

• User interface implemented

• Embedded programming completed

• Full SolidWorks design

• PCB design

System Overview

Client

Bluetag Database

Locked Item

Store Inventory

IDB

Client Software

Engine Interface

Bluetag EngineStore Wireless LAN

IDB

Phone Software

•User Interface BluetagUI.cod implemented

•Engine BluetagEngine.cod implemented

•Server Side Program IDB.exe implemented

Phone Software Specifications

•256 kilobytes on disk

•Downloads in under 11 seconds on EDGE

•Maximum packet size transferred from IDB is less than 2kb (80ms)

•Throughput is limited by the database connection

Phone Software Demo

• IDB Hosted on “BLUETAG” Wireless LAN

• Login, Test Use-cases, Logout

• IDB output on Laptop

Embedded Programming• PIC 16f688 micro connected via UART to

RN-41 Bluetooth module

• Communication protocol

• Demonstration

Communication Protocol

• Used to guarantee message integrity and avoid erroneous execution

• All transmitted bytes or messages are buffered by start and stop bytes

• Unique to each type of message

Message TypesHandshake request/reply

HW Reset Request

HW Reset Success

Retransmit Request

Retransmit Confirm

System Purchase Reset

RN-41

PIC

UART

Unlock request and code

Code match

Code mismatch

Demonstration: Byte DefinitionsRetransmit Request

Handshake

Message Error

Unlock Code

Unlock Miss

Lock Activate

RT

HD

ME

UC

UM

AC

US

RP

TL

RQ

RH

Reset Purchase

Unlock Success

Tag Locked

Hardware Reset Request

Hardware Reset Confirm

Solenoid Driver

•Mini/3V solenoids 14-week lead time, $400+ •Boost circuit satisfies power, money req.•States: CHARGE, FIRE, IDLE•Draws 1.34 mA idle, 200 mA charging

•Schematic Handout: Implementation with screw terminals, hard reset, logic buffers, Molex bus, BJT, current steering diodes

Solenoid Driver

Surface Mount PCB

•Size: 3” x 1.5” x .062”•Parts: $75, Fabrication: $50•Sits above 2.3” x 1” x .2” battery

TOP BOTTOM

Plastic Housing

•Size: 4.5” x 2” x 1.125”•Cost: $50

Estimated Current Budget

• AIRcable SMD: $70.00

• Roving Networks DIP Module: $70.00

• H-Bridge: $20.00

• SMD PCB components: $80.00

• Total: $240.00

Remaining Work

About 65% Complete

FPR Goals

• BlackBerry with Bluetag software installed

• Fully functional Bluetag module

• Interactive retailer database software

• Demonstration of process flow from lock to unlock

Questions

System Overview

StopByte

UART Error Unlocked

YesNo

Sys Reset Stop

Yes No

RPValidate

Validate

NoYes

METL

Set Locked

Hand-

shake

Validate

Validate

Validate

Unlock

HW Reset

Retrans-

mit

ME

HD

Resend Message

WDT Reset

Set Unlocked

Yes

No

UM

USYes

No

ME

Yes

No

ME

Yes

No

Store in Message

Space

Yes

No

RT

Restart UART

Byte from UART

Yes

No

Program FlowTL

ME

HD

US

UM

RP Reset Purchase

Tag Locked

Message Error

Handshake

Unlock Success

Unlock MissRT Retransmit Request

AC

AC Lock Activate RQHardware

Reset

RHReset

Confirm

UC Unlock Code

Simulation

Code Specifications

•Bluetag Engine: 808 lines of Java•BluetagUI: 603 lines of Java•IDB: 907 lines of C# and XSD

Calculated using CLOCIncludes pure code lines only

SMD Part Name Footprint Quantity Manufacturer/Vendor Unit Price SMD Cost

9V Solenoid N/A 1 Shindengen/Bicrom 0.00 0.00PIC16F688-I/SL Microcontroller SOIC-14/Y (Two SL and ST) 1 Microchip/DigiKey 1.88 1.88RN-41 Bluetooth Chip Module/Y 1 Roving Networks 24.95 24.95MC74AC04 DIP and SMD Hex Inverter SOIC-14/Y 1 ON/DigiKey 0.47 0.47TPS6734I Boost Converter SOIC-8/Y 1 TI/DigiKey 3.57 3.57MJD3055 Power NPN BJT DPAK/TO-252/Y 1 Fairchild/DigiKey 0.78 0.78MBR0520/MBRS130T3G Schottky Diode SOD123 - Y/SMB - N 1 MicroCo/DigiKey 0.44 0.44Radioshack 2-Wire Screw Terminal (Blue, set of 4) Y 1 Radioshack 2 23.7V 500mAh Lion Battery Pack 1 all-battery.com 10.95 10.95ADP3301ARZ-3.3 Voltage Regulator 3.3V SOIC-8/Y 1 Analog Devices/Digikey 2.43 2.4310.7k Resistor 0603 SMD/Y 2 033uF 20V Capacitor Tantalum 6032-28 (EIA)/Y 2 AVX/DigiKey 1 2.01 uF Capacitor 0603 SMD/Y 10 AVX/DigiKey 0.028 0.28.047uF Capacitor 0402 (1005 metric)/Y 10 AVX/DigiKey 0.11 1.1.001uF Capacitor 0402 (1005 metric)/Y 10 AVX/DigiKey 0.055 0.5510uH Inductor CDPH4D19FNP-100MC Custom/Y 1 SUMIDA/DigiKey 1.49 1.492200 uF Capacitor Custom/Y 5 Panasonic/DigiKey 2.966 14.831N4148 Diode SOD-323F /Y 1 Fairchild/DigiKey 0.32 0.322.2k Resistor 0805 SMD/Y 1 05-Pin Wire to Board Bus .1 " Pitch Header/Y 1 Molex/DigiKey 0.87 0.87.1 uF Capacitor 0603 SMD/Y 10 AVX/DigiKey 0.077 0.7722pF Capacitor 0402(1005 metric)/Y 10 AVX/DigiKey 0.11 1.120 MHz Crystal Custom/Y 1 Vishay/Mouser 0.52 0.52.47uF Capacitor 0603 SMD/Y 10 AVX/DigiKey 0.11 1.110uF Capacitor 0603 SMD/Y 10 AVX/DigiKey 0.605 6.05Reset Button and ResistorHousing Fab 1 NRI Printing 75 75PCB Fab 1 Advanced Circuits 50 50

Ordered or ArrivedTOTAL 203.45TOTAL W/O HOUSING AND PCB 78.45