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

Foreigner Team Members Drew Whipple – Team Leader Drew Whipple – Team Leader Brandon Ade Brandon Ade Matt Compton Matt Compton Jeff Killen Jeff Killen

Project Overview Cold as Ice Smart Refrigerator Cold as Ice Smart Refrigerator Feature Set: Feature Set: –Utilizes a pre-manufactured miniature refrigerator –Capable of maintaining a running food inventory through use of RFID –Capable of displaying messages (food expirations, temperature, errors) –User can digitally control the temperature

Project Overview Feature Set (cont): Feature Set (cont): –Recipe database –Ethernet connectivity  Allows for remote access to refrigerator information (temperature, food inventory)  Allows for remote entry/querying of recipe database

Success Criteria Ability to sense and decode RFID tags affixed to ‘food’ items. Ability to sense and decode RFID tags affixed to ‘food’ items. Ability to update/maintain a ‘food inventory.’ Ability to update/maintain a ‘food inventory.’ Ability to control cabinet temperature via keypad and web. Ability to control cabinet temperature via keypad and web. Ability to query ‘food inventory’ via web. Ability to query ‘food inventory’ via web. Ability to display status information on an LCD display (e.g., current temp, requested temp, messages). Ability to display status information on an LCD display (e.g., current temp, requested temp, messages).

Block 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 3K 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 DB9 Connector 9 2 ~ Reset Switch 4 2 2

Component Selection Rationale Microcontroller Microcontroller –I/O Pins  23 Pins Needed –Ethernet Interface –Simplicity –Choices  PIC  Rabbit RCM 2200 Microcontroller

Component Selection Rationale LCD Display LCD Display –Text Only –Character Space –Wide Temperature Range –Crystal Fontz  20x4  20x2 Crystal Fontz Standard Parallel 20x4 LCD

Component Selection Rationale Keypad Keypad –Number of Keys  12 (Grayhill) vs. 4 –Decoding Matrix –Functionality  Legend (C & K) –Adhesive vs. Panel Mounting Storm 3000 Series Four-Button Arrow Keypad

Component Selection Rationale RFID Kit RFID Kit –Range  Continuous  Alternatives –Cost Texas Instruments Series 6000 HF RFID Evaluation Kit

Packaging Will utilize a pre-packaged Diplomat miniature refrigerator (white finish) Will utilize a pre-packaged Diplomat miniature refrigerator (white finish) Packaging divided into two sections: Packaging divided into two sections: –External Packaging: LCD display, keypad, and micro-controller housed in plastic enclosure –Internal Packaging: RFID scanner and temperature sensor reside within refrigerator

Packaging - External Micro-controller to be placed in plastic enclosure Micro-controller to be placed in plastic enclosure Keypad/LCD display embedded in plastic enclosure Keypad/LCD display embedded in plastic enclosure Plastic enclosure placed on front door of refrigerator Plastic enclosure placed on front door of refrigerator

Packaging - Internal RFID receiver placed in bottom (or inside front door) of refrigerator RFID receiver placed in bottom (or inside front door) of refrigerator Temperature IC placed on inside of front door Temperature IC placed on inside of front door

Packaging – Materials List Packaging Materials: Packaging Materials: –Diplomat miniature refrigerator –20x4 LCD display –4-arrow keypad –Plastic enclosure box –Internal components (temperature IC, RFID scanner, micro-controller)

Packaging – Cost/Weight Estimates

Temperature Sensor Interface

Ethernet Interface

RFID Interface

RCM 2200 Headers

LCD Interface

3A Step-Down Voltage Regulator

4 Button Keypad Interface

Compressor Interface

Conclusion Thanks for your time and input! Thanks for your time and input! Questions or Comments? Questions or Comments?