Table of Contents Project Overview brief explanation of

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

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

Revised Customer Needs

Engineering Specifications

System Layout

TOP LEVEL MECHANICAL DESIGN

A Preview…

Underside w/ Bottom panel removed

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

Mounting Options

ELECTRICAL TOP LEVEL LAYOUT

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

Elec. Design - Right Circuit cont.

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

Elec. Design - Left Circuit cont.

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

Elec. Design – Component Selection and Analysis Current Estimates Component Current (m. A) Arduino 20 IR Rangefinder 66 LEDs 45 Switches 1 Total 132 Heat dissipation • 1600 m. A/hr Battery will last 12 hours • Without knocking down voltage heat dissipation is near body temperature

SOFTWARE HIGH LEVEL LAYOUT

Microcontroller Selection

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

ARDUINO SOFTWARE FLOW CHART

GUI_App Model Diagram

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

BOM

Risk Management

MSD I Plan

MSD II Plan

Testing Plans

Questions