1. Computer Input Device for Individual with MD
Presented by:
Vince Mi – Communications
Kuya Takami – BSAC
Hyungjin Kim – BWIG
Nathan Werbeckes – Team Leader
Advisor – Prof. John Webster
Clients – Dr. Mary Sesto and Richard Kunz

2. Outline Background Problem Statement Client Requirements
Design Requirements
Forearm Support Designs
Mouse Control Designs
Future Work

3. Background bed-ridden with Muscular Dystrophy.
Can use only three fingers for each hand.
Motion range: circles 1 cm in diameter.

5. Current Device Trackball Slippery Buttons are inconvenient
Setup time is too long

6. Problem Statement Minimize set-up time Make design easier to use
More sensitive to client’s limited motor control
More comfortable support
More durable support

7. Client Requirements More accessible mouse control device
Wrist and forearm support
Comfort and safety
Quick set-up time
Adjustable

8. Design Requirements Connect via USB Easy to set-up Great sensitivity
Easy to grip buttons
Should not chafe skin

9. Adjustable Platform Pros Easy to adjust height Precise height Stable
Cons
Bulky
Heavy

10. Blocks Pros Cons Simplicity More components Easy to construct
Non-precise height

11. Adjustable Legs Pros Easy to adjust Precise height Cons Unstable
Hard to construct

12. Design Matrix – Forearm Support
Weight
Adjustable Platform
Blocks
Adjustable legs
Stability
0.3 9 10 6
Ease of adjustment 8 3
Comfort/Safety
0.2 7
Ease of construction
0.1 5
Cost
Result
8.1
7.7

13. Joystick Pros Great sensitivity Easy to control Cost Cons Setup time

14. Tablet Pros Easy to modify Easy to setup Cons More movement Cost

15. Pointing Stick Pros Great sensitivity Compact Cons Cost
Hard to control

16. Design Matrix – Input Device
Weight
Joystick
Tablet
Pointing Stick
Sensitivity
0.3 7 5 8
Ease of Operation 4
Setup Time
0.2
Cost
0.1 3
Ease of Construction
6.5
5.2
5.9

17. Future Work Proposed Design: Different height joysticks
Forearm Support: Adjustable Platform
Input Device: Joystick
Different height joysticks
Left-hand clicking
Finalize support design
Purchase & personalize prototype

18. References Tablet: www.blaptops.com/computers/hacks/
Pointing stick:
Joystick:
Blocks:
Adjustable legs: