Team 11 – Poseidon

The Team

• Simeon Eisen• Jeff Overweg• Aaron Maley• Jacob VanderWall

Outline• The Problem• Design Decisions• Challenges• Looking Back• Looking Forward• Acknowledgements• Questions

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

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

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

Working Components

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)

Challenges

• Stepper control circuit

Challenges

• Wi-Shield documentation• Trial and error

• Undocumented disabled pins• Rigorous Testing and research

• Router differences• Incorporate instructions in user manual

Looking Back

• Improved definition of goals (vision)• Improved budgeting• Corporate sponsorship• Start prototype building earlier

Looking Forward

• Improved wireless capabilities• More memory for server• Incorporate Ethernet• Ball valve vs. solenoid valve• Shock factor!• Visual / Audible warning indicators• Larger screen

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

Questions?