L3PT Large Portable Projected Peripheral Touchscreen

Team Jackson

Brian Gosselin Greg Langlois Nick Jacek Dmitry Kovalenkov Preliminary Design Review Electrical and Computer Engineer

Tablet PCs Electrical and Computer Engineering       Single user Small workspace • 10’’ diagonal screen Stand alone device Portable Multi touch capabilities Price $500-$1000 2

Smartboard Electrical and Computer Engineering      Large workspace Single / Multi user Multi touch capabilities Not portable Expensive, > $1,000 3

Light Blue Optics: Light Touch      Small interactive screen • 10.1’’ diagonal • Projected on flat surfaces Multi touch capabilities Stand alone device Portable Not commercially available Electrical and Computer Engineering 4

Desired Specifications      Affordable Portable Large workspace Single / Multi user Multi touch capabilities None of these devices meet all of the above specifications.

Electrical and Computer Engineering 5

Engineering solution.. L3PT !

      Affordable Portable Large interactive screen • Projected on flat surfaces • Goal 30-40’’ diagonal screen Single / Multi user Multi touch capabilities Windows 7 peripheral Electrical and Computer Engineering 6

Engineering solution.. L3PT !

Projector IR Camera Projected Interactive Screen USB Connection Microprocessor (Image Processing) Electrical and Computer Engineering 7

Block Diagram Projector IR camera IR emitted light Electrical and Computer Engineering

Computer

Multi touch driver

Microprocessor

Image processing 8

FAVI Mini Pocket Projector (E1-LED-PICO)       Resolution 640x480 USB connection 4.5’’ x 2.4’’ x 1’’ Weight: 4 ounces (w/o batteries) Displays up to 80’’ Price $200 Electrical and Computer Engineering 9

Camera with IR Filter    Resolution 1300x1040 I2C interface Change color filter to IR filter Electrical and Computer Engineering 10

Microprocessor Electrical and Computer Engineering     ATmega328P Using Arduino for prototyping code PDIP28 package with boot loader Tasks: • Camera interaction • Image processing 11

Detection Methods (Option 1)     Layer of IR light Object that breaks the plane reflects light Self contained Possible shadowing IR light Electrical and Computer Engineering 12

Detection Methods (Option 2)      Pens with IR LEDs Switch turns on LED Reduced shadowing LED placement?

Still portable?

Electrical and Computer Engineering 13

Image Processing    Brightest areas = touches Scale touch locations to PC coordinates Send coordinates to computer Electrical and Computer Engineering 14

Windows 7 Driver    Setup calibration Multi touch interface Send touch coordinates to OS Electrical and Computer Engineering 15

Individual Roles  Brian • Team Lead / Webmaster • • Physical assembly USB communication  Dmitry • Camera / IR filtering • Integration of parts • Nick • Driver package • Integrating multi-touch • Greg • Image processing • Position detection Electrical and Computer Engineering 16

Budget

Component

Projector Camera IR Filter Microprocessor 20 IR LEDs PCB Total

Cost

$200 $35 $6 $10 $20 $100 $371 Electrical and Computer Engineering 17

Potential Challenges      Shadowing Delay Position of projector and camera Alignment (Projector vs. camera) Choice of detection method Electrical and Computer Engineering 18

MDR     Choose detection method Position of projector and camera Use camera to detect infrared light Extract coordinates of touch locations Electrical and Computer Engineering 19

Gantt Chart 6 7 4 5

Task #

1 2 3

Task Name

Camera IR detection Extract Coordinates PCB Design

Oct

Send coordinates Win 7 Driver Integration of Parts Final Testing

Nov

Electrical and Computer Engineering

Dec Jan Feb Mar Apr

20

Conclusion      L3PT Interactive product (Good for demo) Mix of software and hardware Single / Multi user Multi touch capabilities Feasible for SDP cost and time constraints Electrical and Computer Engineering 21