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Coin Operated Washer/Dryer Phase 2 May 04-05 April 27,2004

Coin Operated Washer/Dryer Phase 2 May 04-05 April 27,2004. Team Members: Latrice Baggett EE Hisham Chowdhury CPRE Greg Herr CPRE Craig Zamzow CPRE. Client: George Ensley Advisors: Nicola Elia Ratnesh Kumar. Outline. Problem Statement Acknowledgements

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Coin Operated Washer/Dryer Phase 2 May 04-05 April 27,2004

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  1. Coin Operated Washer/Dryer Phase 2May 04-05April 27,2004 Team Members: Latrice Baggett EE Hisham Chowdhury CPRE Greg Herr CPRE Craig Zamzow CPRE Client: George Ensley Advisors: Nicola Elia Ratnesh Kumar

  2. Outline • Problem Statement • Acknowledgements • Operating Environment • Intended Users and Intended Uses • Assumptions and Limitations • End Product and Deliverables • Accomplishments • Approaches considered

  3. Outline (cont.) • Research • Evaluation of Project Success • Recommendations for future work • Lessons Learned • Summary • Questions

  4. Acknowledgements • George Ensley • Dr. Ratnesh Kumar • Dr. Nicola Elia

  5. Problem Statement • Develop a coin operated device that will convert a residential laundry machine into a commercially used laundry machine.

  6. Problem Solution • A coin-operated unit that will regulate the power flow with a relay. • A coin-operated unit that will reclaim time.

  7. Operating Environment • Temperature between 40º F to 120 º F • Potential for bursting water pipes • High humidity from dryers • Possible power outages

  8. Intended Users and Uses Uses • Laundry facilities with multiple machines. • Monitor a machine’s usage: machine cycle count and control box cycle count. • Strategically move machines according to their usage, which will in turn allow for more uniform wear on all of the machines. Users • Laundry facility customers • Laundry facility owners/operators

  9. Assumptions • Low current with door open. • Little or no current when machine is off. • Gas Dryers will draw a detectable current while operating. • Heating elements in electric dryers will switch off and on.

  10. Assumptions (cont) • The owner will not enter the configuration menu while the control box is controlling the machine. • Quarters as the coin payment. • Dryer will have a start button or knob, no auto restart.

  11. Limitations • Prototype must cost less than $150. • The machines require 220V or 110V. • Wire connections between the machine and box are limited to the power cord. • One laundry machine per box.

  12. Limitations (cont) • The cycle timer and window timer is limited from 0 to 99 minutes, mm:ss display. • The cycle count and box count are limited to 256 (8 bit unsigned char).

  13. End Product Deliverables • Partially functional coin operated control system • PIC code • Wiring schematics • Prototype budget • Senior design course documents

  14. Previous Accomplishments • Phase 1 (Dec 00-02) • Purchased parts (PIC, power supply, case) • Designed current sensing circuit. • Designed the power flow relay circuit. • Phase 2 (Dec 01-10) • Researched a different coin mechanism • Started PIC programming, but not completed.

  15. Present Accomplishments • Define algorithm. • Selected micro-controller. • Lab • LCD functionality. • Tested the current sensing circuit. • Keypad Input functionality. • Power flow throughout box. • Menu implemented. • Power switching circuit. • Integration testing.

  16. Approaches Considered Operation Algorithm • Discrete total time • Current detector with total time Current sensing circuit • Solid state AC voltage circuit • Inductor

  17. Coin Acceptor Variable coin receptor Slotted coin mechanism Keypad Smart Dumb Controller PIC FPGA Approaches Considered (cont.)

  18. Approach Used • Current detector with total time • Inductor • Slotted coin mechanism • PIC • Keypad

  19. Research • 1st semester research – washers/dryers and selecting the micro-controller. • 2nd semester research- Dataman and Hi-Tech compilers/simulators. • Hi-Tech ~ compiles C code into hex or assembly. • Programmer (Dataman 48)~ downloads the hex file into the PIC microcontroller

  20. Design Activities

  21. Implementation Activities • Current sensing circuit • Keypad • LCD • Power relay circuit • Interrupts • Owner’s menu

  22. Testing Software Testing • PIC and LCD • PIC and Keypad • PIC and power flow control relay • PIC and coin input mechanism • Menu (state machine)

  23. Testing (cont) Hardware Testing • Power supply • Current sensing circuit • Power switching circuit • Keypad interrupt circuit Entire Unit functionality test (light bulb)

  24. Other Activities • Current sensing circuit • Casing design • UL approval • Manual

  25. Resources • Phase 1 ~ Dec 00-02 All SD documents. • Phase 2 ~ Dec 01-10 All SD documents. • Phase 1 and 2 ~ parts • Client • Advisors

  26. Personal EffortsSpring 2004

  27. Resource and Financial Requirements Spring 2004 Document Binding Poster Parts Total $8.00 $50.00 $30.00 $88.00

  28. Resource and Financial Requirements Total project PIC LCD Keypad Casing materials Wiring materials Coin Mechanism Power supply Total $7 $10 $5 $15 $8 $25 $13 $83.00

  29. @ $10/hr Greg Herr Craig Zamzow Latrice Baggett Hisham Chowdhury Subtotal Project Total Financial Requirements with Labor $1,600.00 $700.00 $670.00 $790.00 $3,760.00 $3,843.00

  30. Schedule

  31. Project Evaluation First Semester: • Project Plan (100%) • Poster (100 %) • Design Report (100%) Second Semester: • Programming PIC (100%) • Integration Testing (95%) • Final Prototype(10%)

  32. Commercialization • Keystone pricing, markup the cost. Ex. Cost = $75, final price = $150. • At $150-$200 our product has high utility/cost and a high rate of return for owners. • Potential market includes all Laundromat owners in the process of remodeling.

  33. Recommendations • Networking multiple control boxes to a local server. • Proper casing • UL approval • Public TVs and Computers • Users manual

  34. Lessons Learned What went well • Group management • Group communication • Documentation What did not go well • Time management • Active participation by all members .

  35. Lessons Learned (cont.) Technical knowledge gained • PIC programming • Interfacing different input/output devices with PIC. Non-Technical knowledge gained • Commercial vs. residential machines. • Determining the market niche of our product.

  36. Lessons Learned (cont.) What would be done differently • Plan more time for programming and testing. • Start implementation process earlier.

  37. Risks and Risk Management Anticipated potential risks • Loss of a team member. • Exceeding costs. Management of potential risks • Document everything. • Communication. • Follow project plan.

  38. Risk and Risk Management (cont) Anticipated potential risks encountered • None Management of anticipated risks • Not needed

  39. Risk and Risk Management (cont) Unanticipated risks encountered • Incorrectly programming the micro- controller. • Time for testing. • Lack of team member(s) participating. Management of unanticipated risks • Spend extra hours in the lab. • Defined consequences of not participating.

  40. Risk and Risk Management (cont) Resultant changes as a result of unanticipated risks • Program completion • Testing completion • An increase in participation from the team.

  41. Summary • Separate coin mechanism to allow the use of non-commercial washer/dryers in a laundromat business. • Integrating a microcontroller with solid-state electrical components to control the flow of electricity to the washer/dryers. • Economical • User friendly

  42. Questions?

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