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Team 11 – Poseidon
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The Team
• Simeon Eisen• Jeff Overweg• Aaron Maley• Jacob VanderWall
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Outline• The Problem• Design Decisions• Challenges• Looking Back• Looking Forward• Acknowledgements• Questions
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The Problem
• Pool maintenance is time consuming and easy to neglect
• There are systems available, but… they are costly and often are not convenient
• An inexpensive, effective system would make the lives of pool owners simpler and create more time for proper leasure
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Design Decisions
• Electronics: Processors and Communication• Atmel ATmega 644p & Atmel ATmega 328• ZG2100 – 802.11b wireless interface chip• Graphic LCD with touch screen overlay
• Electronics: Mechanical Control• Stepper Motors: 5VDC, Half H-Bridge drivers with step
determinant logic• Solenoid Valves: 12VDC, Half H-Bridge driver • Pool Recirculation Pump: 120 VAC, Relay
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Design Decisions
• Granule Dispensing• PVC Pipe• 3 Stepper motor driven feed screws• Solenoid valve channel switching• Anti-backflow valves
• Sensing• Aquarium grade pH and ORP sensors• Diversion chamber with light turbulent flow• Op Amp/Instrumentation amplifier with running
average data filtration
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Working Components
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Dispenser Output Data
0 5 10 15 20 25 30 35 40 45 500
100
200
300
400
500
600
700
800
900
1000
f(x) = 19.5622497998399 xR² = 0.999998095952494
Dispenser Output Mass vs. Auger Rotation
Mass (g)Linear (Mass (g))
Rotations
Out
put M
ass (
gram
s)
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Challenges
• Stepper control circuit
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Challenges
• Wi-Shield documentation• Trial and error
• Undocumented disabled pins• Rigorous Testing and research
• Router differences• Incorporate instructions in user manual
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Looking Back
• Improved definition of goals (vision)• Improved budgeting• Corporate sponsorship• Start prototype building earlier
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Looking Forward
• Improved wireless capabilities• More memory for server• Incorporate Ethernet• Ball valve vs. solenoid valve• Shock factor!• Visual / Audible warning indicators• Larger screen
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Acknowledgements
• Tim Therault – Industrial Consultant• Prof. VanderLeest – Team Advisor• Brian Honeck, Eric Walstra, Darryl DeBruin –
CEAC Reviewers• Bob DeKraker – Parts Ordering• Phil Jasperse – Shop Help
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Questions?