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Table of Contents

Table of Contents. Project Overview (brief explanation of leukodystrophy) Reviewed customer needs Reviewed engineering specs Detailed system lay out Mechanical design Electrical design Software design BOM Cost Layout Current main risk assessment MSD II plan Test Plan.

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Table of Contents

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  1. Table of Contents • Project Overview (brief explanation of leukodystrophy) • Reviewed customer needs • Reviewed engineering specs • Detailed system lay out • Mechanical design • Electrical design • Software design • BOM • Cost Layout • Current main risk assessment • MSD II plan • Test Plan

  2. Project Overview – Leukodystrophy and Goal Leukodystrophy: • Genetic condition in which myelin sheaths in neurons degrade over time • Leads to difficulty moving and speaking Our goal: • Provide a customer who has leukodystrophy with a way to enjoy electronic games using limited movements

  3. Revised Customer Needs

  4. Engineering Specifications

  5. System Layout

  6. TOP LEVEL MECHANICAL DESIGN

  7. A Preview…

  8. Underside w/ Bottom panel removed

  9. Mech. Design – Purchase Component selection and analysis • Joystick Options – Pros/cons • Baseboard Option – Purchase Option • Baseboard Options – weight, cost, pros/cons • Baseboard Options – Stress Analysis

  10. Mounting Options

  11. ELECTRICAL TOP LEVEL LAYOUT

  12. Elec. Design - Right Circuit Board • USB port • Right side IR sensor (leg motion) connection • Right IR sensor tuning pot • Right Joystick (arm motion) connections • Right Joystick tuning pot • LED control circuitry and connections • Arduino connections

  13. Elec. Design - Right Circuit cont.

  14. Elec. Design - Left Circuit Board • Left IR sensor tuning pot • Right Joystick tuning pot • Power Control Circuitry • Mode Switch • Left side IR sensor (leg motion) connection

  15. Elec. Design - Left Circuit cont.

  16. Elec. Design - IR Range Finder • Variety of available ranges for RI sensors • Processing on board • Durable plugs

  17. Elec. Design – Component Selection and Analysis • 1600 mA/hr Battery will last 12 hours • Without knocking down voltage heat dissipation is near body temperature Heat dissipation

  18. SOFTWARE HIGH LEVEL LAYOUT

  19. Microcontroller Selection

  20. Final Choice: Arduino Micro • Familiar language semantics • Many examples/libraries available • USB interface on-chip • Free IDE • Cross-platform (Windows, Mac, Linux) • Sufficient I/O and processing capability • Small and lightweight • Relatively inexpensive

  21. ARDUINO SOFTWARE FLOW CHART

  22. GUI_App Model Diagram

  23. Samsung Galaxy Tab Interface Methodologies • Method 1 (preferred) • Method 2

  24. BOM

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