18 December 2009 1

The Mnemosyne Team

Priyanka Deshmukh

Chief Executive Officer

18 December 2009 2

Ana Namburete

Chief Technical Officer

Rachel Cheng

Chief Operations Officer

Surbhi Seru

Chief Marketing Officer

Outline• Introduction

• System Overview

• High Level System Design

• Market Analysis

• Budget and Timeline

• Future Development

• Lessons Learned

• Conclusion

• Acknowledgements18 December 2009 3

Introduction• CheckList™ alleviates problem of forgetfulness

• Portable memory aid device

• Prevents items from being left behind

• Easy to use

18 December 2009 4All you need to remember is your CheckList™

System Overview

18 December 2009 5

NHD-C0216CiZ-FSW-FBW-3V3 (New Haven Displays)

MSP430 eZ430 RF2500(Texas Instruments)

Visual C++ and QT application development platform

High Level System DesignUser

GUI

Pseudo Database(text file)

USB DebuggingInterface

CC2500RF chip

F2274 Microcontroller

ActiveTags

LCD

COM Port

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Graphical User Interface (GUI)

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• Welcome Window

Graphical User Interface (GUI)

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• Only 1 user profile permitted

Graphical User Interface (GUI)

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• Login Window – CheckList™

Graphical User Interface (GUI)

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• Security Question Option

Graphical User Interface (GUI)

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• Activating/Deactivating Tags

Graphical User Interface (GUI)

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• Activating/Deactivating Tags

Graphical User Interface (GUI)

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• Unsuccessful Connection with COM Port

Graphical User Interface (GUI)

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• Successful Connection with COM Port

Detection Unit

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Data is read

from COM

port …

… and stored

in appropriate

memory

locations

Detection Unit

16

32KB Flash memory(data storage)

2.4GHz Transceiver

Pins used for I2C communication with LCD

Detection Unit

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Detection Unit

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• Missing Item Tag DetectionPower ON

Initialize SimpliciTI RF

network

Clear all tag flags

Wait for ED’s to join network

Receive packet and interpret contents

RSSI <50?

Tag recognized

?

Set corresponding tag flag

ED join success?

Clear tag

Button pressed?

Check value of tag

Flag = 0?

Display item name to LCD

Last tag to be

checked?

Yes

No

YesNo

Yes

Yes

Yes

No

No

Detection Unit

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Tag1: Laptop

Tag2: Car Keys

Tag3: Textbook

Tag4: Reading glasses

C a r K e y sR e a d i n g G l a s s e s

Detection Unit

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Tag1: Laptop

Tag2: Car Keys

Tag3: Textbook

Tag4: Reading glasses

C a r K e y sR e a d i n g G l a s s e sL a p t o p

Detection Unit

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Tag1: Laptop

Tag2: Car Keys

Tag3: Textbook

Tag4: Reading glasses

R e a d i n g G l a s s e s

Market Analysis• Target markets:

Households

• Many things to keep track of

Professionals

• Ensure important work-related items are not forgotten

Travellers

Healthcare

• Dementia patients

• Alzheimer's patients

Anyone and everyone!

18 December 2009 22To forget is human…

Market Analysis• Current solutions:

Paper-based

• Post-It Notes™

• To-do lists

• Planners or agendas

Electronic-based

• Computer applications

• Personal Digital Assistants (PDAs)

• Cell phones or smart phones

• All require users to manually check for items

18 December 2009 23

Market Analysis• Our proposed solution: CheckList™

Simple: easy for general public to use

RF-based: eliminates manually checking for items

Portable: can be used in any environment or situation

Inexpensive: affordable for most people

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Market Analysis

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ITEM1000 UNITS MASS PRODUCED

PARTS RETAIL PRICE PARTS RETAIL PRICE

1 detection unit $22.70 $45.00 $11.35 $23.00

1 active tag $4.63 $10.00 $2.16 $4.50

1 detection unit

and 4 active tags$41.23 $82.00 $20.62 $41.00

10 active tags $46.30 $90.00 $23.15 $46.00

Budget

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• Estimated Cost: $850

• Realized Cost: $778

$0 $200 $400 $600 $800 $1,000

Estimated

Realized

Budget

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COMPONENT ESTIMATED COST

LCD $40.00

RF Transmitter/Receiver $300.00

RF Tags $40.00

Controller/Processor $250.00

USB Interface $30.00

Power Supplies $40.00

Prototyping Board $50.00

Contingency $100.00

TOTAL COST $850.00

Budget

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COMPONENT REALIZED COST

LCD $169.00

RF Transmitter/Receiver $138.00

RF Tags $149.00

Other Components $68.00

Power Supplies $73.00

Miscellaneous $181.00

TOTAL COST $778.00

BudgetLost expenses:

• LCDs purchased initially were not used ($136)

• Other components purchased to use with LCDs (also not used):

Voltage regulators ($5)

Level shifters ($10)

• Purchased extra components and supplies

Batteries

Device cases

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Budget• Could construct another proof-of-concept

prototype for less

$80 (1 detection unit and 1 tag)

No extra components

• Cost of 1000 retail units even less

$27 (1 detection unit and 1 tag)

No extra modules on boards

Purchasing power

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Timeline

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Aug 30 Sep 19 Oct 9 Oct 29 Nov 18 Dec 8 Dec 28

Research

ProjectProposal

FunctionalSpecification

DesignSpecification

Design & TestingIndividual Modules

Integrationof Modules

Testing ofPrototype

PrototypeAdjustments

Post-Mortem

EstimatedRealized

Team Dynamics• Well defined roles and responsibilities

Priyanka: LCD-MCU interface implementation and testing

Rachel: GUI design, implementation and testing

Ana: LCD-MCU interface implementation and testing; RF detection implementation and testing

Surbhi: Hardware assembly, implementation and testing

• Everyone helped with other areas when needed

• All documentation was a combined effort18 December 2009 32

Lessons Learned• Research must be done thoroughly

• Ask for help and advice when you need it

• Perfectionism is inefficient

• Communication is critical

18 December 2009 33

Future Development• Smaller size

Develop custom chips

Implement device on custom printed circuit boards

• Longer battery life

Remove all extra power-consuming components

Implement on-off switch for LCD backlight

• Continuous mode

Constantly check for presence of tags

Audible alarm if a tag leaves the vicinity

18 December 2009 34

Conclusion• Mnemosyne Innovation’s CheckListTM Prototype

successfully created

Has future potential (low cost + high effectiveness)

Filling niche in the market

• ENSC 440 valuable experience

Technical

Soft skills

18 December 2009 35

Acknowledgements• John Bird, ENSC 440 Instructor

• Steve Whitmore, ENSC 305 Instructor

• Jason Lee, ENSC 305/440 Teaching Assistant

• Kourosh Khosraviani, Graduate Student

• Brandon Ngai, CiBER Lab Researcher

• Pranav Gupta, Undergraduate Student

• Thomas Watteyne, UC Berkeley Post-Doc Researcher

18 December 2009 36

Thank You

Questions?

18 December 2009 37

References[1] "IconTexto Web 2.0 User", EvoHosting. [Online]. Available: http://www.evohosting.co.uk/blog/web-

development/design/more-free-social-media-icons/ [Accessed: Dec 13, 2009].

[2] Matrix Orbital, “Technical Manual: LCD (#LK162-12)", v.3.1, March 2003 [Online] Available: http://www.matrixorbital.ca/manuals/LK_series/LK162-12/LK162-12_220.pdf [Accessed: Oct. 15, 2009].

[3] Microsemi Integrated Products, "Production Datasheet: PCA9306 Dual Channel 1A Low Dropout Regulator (#LX8816)“ [Online] Available: http://www.datasheetcatalog.org/datasheet/microsemi/lx8816.pdf [Accessed: Nov 2, 2009].

[4] New Haven Display, “NHD‐C0216CiZ‐FSW‐FBW‐3V3 COG (Chip‐on‐Glass) Liquid Crystal Display Module", *Online+ Available: http://www.newhavendisplay.com/specs/NHD-C0216CiZ-FSW-FBW-3V3.pdf [Accessed: Dec. 2, 2009].

[5] NXP, "Product Datasheet: Dual Bidirectional I2C -bus and SMBus voltage-level translator", rev.04, 2009 [Online] Available: http://www.nxp.com/documents/data_sheet/PCA9306.pdf [Accessed: Dec 4, 2009].

[6] S.Tanenbaum and A.Tate, "Computer Ports: All You Need to Know", Real Simple.[Online].Available: http://pdf1.alldatasheet.com/datasheet-pdf/view/184776/TI/MSP430X22X4.html [Accessed: Dec 13, 2009].

[7] Sitronix, “ST7032 Dot Matrix LCD Controller/Driver", *Online+ Available: http://www.newhavendisplay.com/app_notes/ST7032.pdf [Accessed: Dec 02, 2009].

[8] Texas Instruments, “CC2500: Low-Cost Low-Power 2.4GHz RF Transceiver”, v.1.2, June 2006 *Online+ Available: http://focus.ti.com/lit/ds/symlink/cc2500.pdf [Accessed: October 10, 2009].

[9] Texas Instruments, “eZ430” *Online+ Available: http://focus.ti.com/lit/ug/slau227e/slau227e.pdf [Accessed: Sept. 27, 2009].

[10] Texas Instruments, “MSP430x22x2, MSP430x22x4 MIXED SIGNAL MICROCONTROLLER”, July 2006 *Online+ Available: http://pdf1.alldatasheet.com/datasheet-pdf/view/184776/TI/MSP430X22X4.html [Accessed: Oct. 10, 2009].

[11] Texas Instruments, “SLAU144,MSP430x2xx Family User's Guide”,(Rev.E), 2008 [Online] Available: http://focus.ti.com/lit/ug/slau144e/slau144e.pdf [Accessed: Nov. 22, 2009].

[12] TrollTech, "Qt's Classes", 2005. [Online] Available:http://doc.trolltech.com/3.3/classes.html [Accessed: Oct. 29, 2009].

18 December 2009 38

High Level Functional Diagram

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System Flowchart

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Hardware Flowchart

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MSP430 eZ430 RF2500

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MSP430 eZ430 RF2500

18 December 2009 43

MSP430 eZ430 RF2500

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GND

3V

VCC

SCL

SDA

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MSP430-F2274

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· 16-MIPS performance

· 200-ksps 10-bit SAR ADC

· Two built-in operational amplifiers

· Watchdog timer, 16-bit Timer_A3 and Timer_B3

· USCI module supporting UART/LIN, (2) SPI, I2C, or IrDA

· Five low-power modes drawing as little as 700 nA in standby

CC2500

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· 2.4-GHz radio-frequency (RF) transceiver

· Programmable data rate up to 500 kbps

· Low current consumption

SimpliciTI Networking Protocol

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I2C Communication

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USCI Block Diagram:

I2C Mode

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0 1 1 1 1 1 0

0 0x7C

0x3E **For New LCD

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Basic Clock Module:

Block Diagram

Low

Frequency

Oscillator

High

Frequency

Oscillator(not present in

F2274)

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LCD # 1 LK162-12

(Matrix Orbital)

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Voltage Regulation(LX 8816)

Dual Channel 1A Low Dropout Regulator

(Microsemi)

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Key Features

2 independent regulated outputs

Independent thermal and current limit

protection.

First - 3.3 V fixed voltage output

Second – Adjustable voltage output – i.e. 5V in our

case

18 December 2009 66

18 December 2009 67

Voltage Regulator Circuit

18 December 2009 68

Level Translation(PCA9306)

Dual Bidirectional I2C-bus and SMBus voltage-level translator

(NXP - Philips)

18 December 2009 69

Key Features

2-bit bidirectional translator for SDA and SCL lines in

mixed-

mode I2C-bus applications

Standard-mode, Fast-mode, and Fast-mode Plus I2C-

bus and

SMBus compatible

Allows voltage level translation between:

3.3 V Vref(1) and 5 V Vbias(ref)(2) in our case

Low voltage side

(MSP)

High voltage side

(LCD)

18 December 2009 70

Low voltage side

(MSP)

High voltage side

(LCD)

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Sizing the Pull-up Resistor

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LCD # 2 NHD‐C0216CiZ‐FSW‐FBW‐3V3

COG (Chip‐on‐Glass) Liquid Crystal Display Module

(New Haven Display)

18 December 2009 73

Functions and Features

• 2 lines x 16 characters

• Built‐in ST7032i‐oD with I²C interface

• 5x8 pixels with cursor

• 3V power supply

• 1/16 duty, 1/5 bias

• RoHS Compliant

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Slave Address = 0x7C

0x7C

0x3E

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Controller Information Built‐in

ST7032i‐oD

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I2C Acknowledge

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I2C Acknowledge (cont.)

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I2C Interface - Register Loading Process

18 December 2009 87

V0 Voltage Follower Value Calculation

α = 37 , VREF = 2.19 V and if 1 + (Rb/Ra)

= 2.5

Then V0 = 5.475 VTherefore:

C5, C4, C3, C2, C1, C0 = 1 0 0 1 0 1

Rab2 , Rab1 , Rab0 = 1 0 1

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