1. Team 11 – Poseidon

2. The Team Simeon Eisen Jeff Overweg Aaron Maley Jacob VanderWall

3. Outline The Problem Design Decisions Challenges Looking Back Looking Forward Acknowledgements Questions

4. 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

5. 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

6. 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

8. Working Components

9. Dispenser Output Data

10. Challenges Stepper control circuit

11. Challenges Wi-Shield documentation Trial and error Undocumented disabled pins Rigorous Testing and research Router differences Incorporate instructions in user manual

12. Looking Back Improved definition of goals (vision) Improved budgeting Corporate sponsorship Start prototype building earlier

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

14. 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

15. Questions?