Spa Commander: Innovative Chemical Delivery System

1. SPA COMMANDER Dan Latuszek Ken Chou Matt Bergsma Michelle Ochitwa Sulien Wong

2. Team Introduction Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • 5 dedicated engineering students focused on improving people’s lives • Dan Latuszek – Chief Executive Officer • Systems Engineering • Sulien Wong – Chief Financial Officer • Systems Engineering • Matt Bergsma, DipT – Chief Technical Officer • Systems Engineering • Michelle Ochitwa – Vice President Operations/acting secretary • Systems Engineering • Ken Chou – Chief Marketing Officer • Biomedical Engineering • Wouldn’t mind getting rich

3. Engineering Roles Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Market analysis • Ken Chou, Dan Latuszek, Michelle Ochitwa, Sulien Wong • Software control and electrical design • Ken Chou, Dan Latuszek, Sulien Wong • Mechanical and fluid system design • Matt Bergsma, Michelle Ochitwa • Chassis • Ken Chou, Matt Bergsma

4. Presentation Overview Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Goal • Market analysis and consumer needs • Budget and time management • Mechanical and sensors • Electrical and control • Cost of production, marketability, and viability • Future considerations • Acknowledgements • Final thoughts

5. Project Goals Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Design a chemical test and delivery system for spas and pools • Create a portable solution • Fabricate a working prototype • Capture an unused market niche • Get rich

6. Market and design considerations

7. Market Analysis Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • In North America alone: • Over 6 million existing private spas/hot tubs • Annual sales exceed 300,000 units • Over 8 million existing private pools • Annual sales exceed 300,000 units • Majority of both markets require manual chemical calibration • Currently available products: • Expensive inline systems costing well over $1000

8. Consumer Needs Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Easy to use and automatic • Not overly expensive • Durable • Aesthetically pleasing

9. Budget Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Upper limit of $500 CAD • No lower limit (Yay, profits!) • Find a golden mean between low cost and high reliability

10. Time Management Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • In 3 months • Complete documentation • Complete hardware and software design • Piping, motors, PIC programming • Test and debug • Analyze operation and proof of concept

11. Time Management Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts

12. Mechanical and sensors

13. Safety Requirements Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Importance of chemical levels: • High chlorine concentration causes • Skin irritation, eye irritation, respiratory problems • Low of a chlorine concentration • Infections, bacterial growth • pH needs to be maintained at 7.5, that of a human eye • The Spa Commander maintains chemical levels at: • Between 1 ppm and 3 ppm for chlorine • Between 7.4 and 7.6 for pH

14. Mechanical Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • 3 servo motors control the gates of the chemical containers • Submersible pump to move the pool water • PVC piping for light weight, low cost control of water flow • 300 mL chemical containers • Approximately one month’s worth of chemical for a spa

15. Mechanical Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts

16. Servo Motor Specifications Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Model: HS-82MG • 0 degrees • Square wave, 20 ms period @ 5% duty cycle • 90 degrees • Square wave, 20 ms period @ 10% duty cycle

17. Sensors Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Current implementation – current based electrolytic sensors • Operates under similar principles as ORP sensors

18. Control, electrical, and interface

19. Control Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Microchip PIC16F690 microcontroller • Servo motor pulse width modulation • Controls LED interface

20. Chlorine Flowchart Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts

21. pH Flowchart Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts

22. Electrical Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Converted 100W AT power supply • Rails: • 5V (red) • +/- 12V (yellow, blue) • 3.3V (orange) • 5V standby (purple) • Filter, op-amp, sensor

23. Interface Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • 7 LEDs • Rationale: simplicity • No user input

24. Post-design thoughts

25. Actual Cost of Production Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Assuming we are able to attain bulk prices • Motors: $60 • pH and Cl sensors: $100 (different from current implementation) • Casing: $20-30 • Piping/containers: $10 • Microcontroller: $2 • Pump: $20-30 • Power supply: $30 • Other electronic components: <$10 • Total: $250-270 + Labour

26. Marketability Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Very marketable product • Greatly reduces the burden of spa owners • Relatively inexpensive, depends on how much consumers are willing to pay

27. Final thoughts

28. Future Considerations Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Improve chassis aesthetics and shrink dimensions • Very integral to consumer decisions • Improve interface aesthetics • Maybe a small LCD display • Improve Sensor Performance • Use higher quality ORP sensors • Much more accurate • Much more expensive • Implement shocking feature • More waterproofing and failsafe

29. Acknowledgements Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Dr. Andrew Rawicz, Steve Whitmore • Duncan Chan, Ali Ostafar, Sara Mogahddamjoo • Dan Bergsma • Masih Hosseini • Friends and Family

30. Final Thoughts Team Intro Overview Goals Market and Design Market Stats Needs Budget Time Technical Overview Mechanical Sensors Control Electrical Interface Post-Design Cost of Prod. Marketability Final Thoughts Future Consid. Thanks Final Thoughts • Completed proof of concept design • Gained valuable experience • Documentation, team dynamics, interdisciplinary process

31. Questions?