ECE 477 Design Review Team 4 ? Spring 2006

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ECE 477 Design Review Team 4 ? Spring 2006
Justin Thacker, Matt Kocsis, Ian Snyder, Dustin
Poe
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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

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Project Overview

• The Digital Real-time Intelligent Networked
  Kegerator will address safety, legal, usability,
  and economic concerns of draft beverage
  distribution. Alcohol consumption monitoring will
  provide a tool to allow a person to know exactly
  how much they have consumed, learn estimated
  legal limits, and reduce unauthorized or unlawful
  drinking. System control and monitoring will
  allow users to track inventory, decrease beverage
  waste, and predict future resource needs.

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Project-Specific Success Criteria

• An ability to sense and control beverage
  temperature.
• An ability to identify authorized users via
  electronic identification.
• An ability to track consumption on an individual
  basis.
• An ability to display user/device status on an
  LCD.
• An ability to control the function of and report
  the status of the kegerator via an embedded web
  server.

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Block Diagram
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Microprocessor Selection
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LCD Selection
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RFID Reader Selection
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Packaging Design

• Self contained unit
• Easy to add on to existing system

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Schematic/Theory of Operation
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Schematic/Theory of Operation
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Schematic/Theory of Operation
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Schematic/Theory of Operation
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Schematic/Theory of Operation
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Schematic/Theory of Operation
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Schematic/Theory of Operation
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Schematic/Theory of Operation
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PCB Layout
236 mm
117mm
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Bottom Copper
Digital Gnd
i
Analog Gnd / Power Gnd 50 mil
Pins 2 and 3 Internally Connected Single Point of
Analog and Digital Ground
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Top Copper
5V Traces 50 mil
3.3V
12V 50 mil
12V 60 mil
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PCB Layout
Temp/ Compress
Biometric Future Dev
Serial Interface
Common Beverage Interface
RCM3315 Microcontroller Module
5V and 3.3V Converters
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Common Beverage Interface

• Have common I/0 simplified easily through symmetry

• Segregates High Current Analog From Rest of
  Circuit

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DC to DC Converter

• Traces made short and large as possible
• Bypass Capacitors mounted underneath to get as
  close as possible
• Power and Signal Gnds Segregated
• EMI reduction

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Software Design/Development Status

• All functions built into costate statements.
• Temperature polling
• Rabbit web
• External events triggered by interupts.
• Flowmeters code working on rabbit
• Other hardware over serial communication.
• Bill Validator code working on rabbit
• RFID code working on rabbit
• LCD code working on computer

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Project Completion Timeline

• Week 8 PCB and Schematic finalization and test
  circuits
• Week 9 Finalize PCB and test circuits
• Week 10 Complete all functional software
  modules and hardware testing
• Week 11 PCB integration and testing
• Week 12 Integrate controller functions with web
  and hardware testing
• Week 13 Add complex features
• Week 14 Test complex features, create video and
  poster
• Week 15 Final Presentation, Report

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Questions / Discussion