Table of Contents Project Overview (brief explanation of leukodystrophy) Reviewed customer needs...

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 speakingOur goal:• Provide a customer who has leukodystrophy

with a way to enjoy electronic games using limited movements

Revised Customer Needs

Engineering Specifications (Revised)

System Layout

TOP LEVEL MECHANICAL DESIGN

A Preview…

Mounting Options

Mech. Design – subsystems

– Baseboard Assembly– Slide Mount Assembly (left and right)– Armrest Assembly (left and right)– Enclosure Assembly– Front Panel Assembly– Mount/Handle Assembly

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• Max power dissipation allowable with

enclosure

Mech. Design – Critical/manufactured components

• Baseboard Platform• Swivel Platforms (top and bottom)• Front Plate• Control Handles• Mount/Handle Brackets• Armrests• Slide Mounts?

Elec. Design – Block Diagram

Elec. Design - Each Schematic

Elec. Design – Component Selection and Analysis

• Cords• Gold plated switches• Battery

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

Cost Distribution

Risk Management

MSD I Plan

MSD II Plan

MSD II Plan

Testing Plans

• Table of specs and corresponding testing plans