Team Foreigner (Group 11) “Cold as Ice” Smart Refrigerator Midterm Design Review

Team Foreigner (Group Team Foreigner (Group 11)11)

“Cold as Ice” Smart “Cold as Ice” Smart RefrigeratorRefrigerator

Midterm Design ReviewMidterm Design Review

Foreigner Team MembersForeigner Team Members

Drew Whipple – Team LeaderDrew Whipple – Team Leader Brandon AdeBrandon Ade Matt ComptonMatt Compton Jeff KillenJeff Killen

Project OverviewProject Overview

Cold as Ice Smart RefrigeratorCold as Ice Smart Refrigerator Feature Set:Feature Set:

– Utilizes a pre-manufactured miniature Utilizes a pre-manufactured miniature refrigeratorrefrigerator

– Capable of maintaining a running food Capable of maintaining a running food inventory through use of RFIDinventory through use of RFID

– Capable of displaying messages (food Capable of displaying messages (food expirations, temperature, errors)expirations, temperature, errors)

– User can digitally control the User can digitally control the temperaturetemperature

Project OverviewProject Overview

Feature Set (cont):Feature Set (cont):– Recipe databaseRecipe database– Ethernet connectivityEthernet connectivity

Allows for remote access to refrigerator Allows for remote access to refrigerator information (temperature, food inventory)information (temperature, food inventory)

Allows for remote entry/querying of recipe Allows for remote entry/querying of recipe databasedatabase

Success CriteriaSuccess Criteria

Ability to sense and decode RFID tags Ability to sense and decode RFID tags affixed to ‘food’ items.affixed to ‘food’ items.

Ability to update/maintain a ‘food Ability to update/maintain a ‘food inventory.’inventory.’

Ability to control cabinet temperature via Ability to control cabinet temperature via keypad and web.keypad and web.

Ability to query ‘food inventory’ via web.Ability to query ‘food inventory’ via web. Ability to display status information on an Ability to display status information on an

LCD display (e.g., current temp, requested LCD display (e.g., current temp, requested temp, messages).temp, messages).

Block DiagramBlock Diagram

9V DC wall-wart

Texas Instruments Housed S6350 Midrange RFID Reader

RabbitCore RCM2200 C-Programmable Module with Ethernet

12V DC wall-wart

National Semiconductor LM2676S – 5.0 3A step-down voltage regulator

Maxim +/- 15kV ESD-Protected, Signle/Dual/Octal, CMOS Switch Debouncers Storm

3K0421 4-button keypad

Microchip TC72 Digital Temperature Sensor with SPI Interface

Potter & Brumfield T77S1D10-05 Sealed Power Relay

Crystalfontz America, Inc. Mod. CFAH2004A-NYA-JP 4x20 LCD

Compressor

Ethernet Port

120V AC wall outlet

DB

9 C

on

necto

r

9

2

~

5

4

8

Reset Switch

4

2

2

Component Selection Component Selection RationaleRationale

MicrocontrollerMicrocontroller– I/O PinsI/O Pins

23 Pins Needed23 Pins Needed

– Ethernet InterfaceEthernet Interface– SimplicitySimplicity– ChoicesChoices

PICPIC RabbitRabbit

RCM 2200 Microcontroller

Component Selection Component Selection RationaleRationale

LCD DisplayLCD Display– Text OnlyText Only– Character SpaceCharacter Space– Wide Temperature Wide Temperature

RangeRange– Crystal FontzCrystal Fontz

20x420x4 20x220x2

Crystal Fontz Standard Parallel 20x4 LCD

Component Selection Component Selection RationaleRationale

KeypadKeypad– Number of KeysNumber of Keys

12 (Grayhill) vs. 412 (Grayhill) vs. 4

– Decoding MatrixDecoding Matrix– FunctionalityFunctionality

Legend (C & K)Legend (C & K)

– Adhesive vs. Panel Adhesive vs. Panel MountingMounting

Storm 3000 Series Four-Button Arrow Keypad

Component Selection Component Selection RationaleRationale

RFID KitRFID Kit– RangeRange

ContinuousContinuous AlternativesAlternatives

– CostCost

Texas Instruments Series 6000 HF RFID Evaluation Kit

PackagingPackaging

Will utilize a pre-packaged Diplomat Will utilize a pre-packaged Diplomat miniature refrigerator (white finish)miniature refrigerator (white finish)

Packaging divided into two sections:Packaging divided into two sections:– External Packaging: LCD display, External Packaging: LCD display,

keypad, and micro-controller housed in keypad, and micro-controller housed in plastic enclosureplastic enclosure

– Internal Packaging: RFID scanner and Internal Packaging: RFID scanner and temperature sensor reside within temperature sensor reside within refrigeratorrefrigerator

Packaging - ExternalPackaging - External

Micro-controller to Micro-controller to be placed in be placed in plastic enclosureplastic enclosure

Keypad/LCD Keypad/LCD display embedded display embedded in plastic in plastic enclosureenclosure

Plastic enclosure Plastic enclosure placed on front placed on front door of door of refrigeratorrefrigerator

LCD Display

17.5 in

18 in

19.25 in

10 in

8 in Plastic

Enclosure

4-Arrow Keypad

RJ-45 Connector

Mini-Refrigerator Front Door

Packaging - InternalPackaging - Internal

RFID receiver RFID receiver placed in bottom placed in bottom (or inside front (or inside front door) of door) of refrigeratorrefrigerator

Temperature IC Temperature IC placed on inside placed on inside of front doorof front door

RFID receiver located in bottom (or possibly on side) of refrigerator

Temperature sensor IC

Packaging – Materials ListPackaging – Materials List

Packaging Materials:Packaging Materials:– Diplomat miniature refrigeratorDiplomat miniature refrigerator– 20x4 LCD display20x4 LCD display– 4-arrow keypad4-arrow keypad– Plastic enclosure boxPlastic enclosure box– Internal components (temperature IC, Internal components (temperature IC,

RFID scanner, micro-controller)RFID scanner, micro-controller)

Packaging – Cost/Weight Packaging – Cost/Weight EstimatesEstimates

Material Weight (lbs) Cost ($) Mini-Refrigerator 55 110.00 Plastic Enclosure 0.5 6.00

20x4 LCD Display 0.5 17.61 4-Arrow Keypad 0.5 19.75

Rabbit 2200 Microcontroller 0.5 55.00 RFID Receiver 1 645.00

Temperature Sensor IC Negligible 0.94 Total 58.00 854.30

Temperature Sensor Temperature Sensor InterfaceInterface

Ethernet InterfaceEthernet Interface

RFID InterfaceRFID Interface

RCM 2200 HeadersRCM 2200 Headers

LCD InterfaceLCD Interface

3A Step-Down Voltage 3A Step-Down Voltage RegulatorRegulator

4 Button Keypad Interface4 Button Keypad Interface

Compressor InterfaceCompressor Interface

ConclusionConclusion

Thanks for your time and Thanks for your time and input!input!

Questions or Comments?Questions or Comments?