Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

PDR PRESENTATION

Electronic Dartboard (ED)

Azum Z. Ali, Jason Ngo, Matthew O’Connell, Han TruongFaculty Advisor: Prof Massimo (Max) V. Fischetti

Thursday, October 13, 2005

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

Introduction

● Building an Electronic Dartboard (“ED”) that automatically

keeps track of score● Recreational activity for a variety of potential customers● Automation is provided by electronic system● Sensing Array● Intermediate hardware for data transmission● Software for computation and output

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

Background

● Dartboard on the market – made out of plastic– very unreliable– unattractive– not regulation– use plastic darts

● ED's Design– horse hair/cork– reliable scoring– sleek design– regulation size– any standard darts

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

Motivation

• Darts are a fun recreational activity• Project deliverable fun and enjoyable• End disputes over scoring, cheating• No longer responsible for scorekeeping, more

focus on fun and gameplay• Great to demo for SDP06

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

Overview

• Sectionalized board• Sensing electronics• Data Transmission• Software• Combine into

functional design

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

Long-term goal

● MDR– Working reliable sense system– Efficient data transmission

● Final Design– All sections working– Accurate scoring

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

The Present Situation

● Researched hardware specs● All sensors are on order (multiple options)● Micro-controllers chosen● Chose serial transmission● Overall plan agreed upon

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

Development up to present

● Members researched different sensors● Spare dartboard for implementation● Extra parts for testing● Sensors agreed to test

– Strain gauges, Piezoelectric, Push-Button

● Sensor rejected– Laser grid (cost, unfeasible implementation)

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

Potential Alternatives

• Strain gauges

– pressure applied resistance goes up

– create resistor circuit for voltage differences

• Pros

– Simple design

– Sensitive to pressure

– Low cost

• Cons

– Is it too sensitive?

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

Potential Alternatives(contd.)

• Piezoelectric– Disturbance in Quartz crystals on Piezo material

induces a voltage• Pros

– Low cost– Piezo material can cover area needed– Good sensitivity

• Cons– Could damage Piezo film with darts

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

Potential Alternatives(contd.)

• Pushbutton– Spring is compressed, voltage signal output

• Pros

– reliable

– different sizes, shapes, springs

– Low cost

• Cons

– sensitivity of pressure applied

– spring constants

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

System Block Diagram

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

● Pressure sensors ● A/D Converter● Foot Line Sensor● Power supply

Dartboard Electronics

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

● Receive Data● Store Data● Convert Data● Transmit Data● Serial Connection

Microprocessor

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

● Store Data● Compute Data● Display Data● GUI

Computer Program

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

Proposed MDR Specifications

● One or more sensing options working● Operational sensor applied to sections on

dartboard● Serial transmission of bits to computer● Computer recognizes values assigned to

sections

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

Conclusion

● Automatically keep score● Efficient and Reliable Sensing● Values recognized and Displayed on GUI● Overall fun and hassle-free gameplay!

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

Any questions?