1. Trax Technologies Inc. Wireless Home Phone-Operated Assistant

2. Agenda Project Overview Central Control Unit Client Appliance Unit Problems Encountered Business Components Conclusion Q&A

3. Project Overview

4. Group Member Hou, Sean

5. Group Member Lin, Jack

6. Group Member Yu, Fred

7. Group Member Chen, David

8. Group Member Chang, Howard

9. Introduction to HomePA Purpose –Provide assistance for seniors/disables –Provide security for households Technology –Telephone –Wireless –Actuator

10. Introduction to HomePA Vacation in Hawaii - $2000 Forget to turn off your light - $40 House being broken into - $5000 Knowing that your house is secured and can be controlled through a simple phone call – PRICELESS!!!!!!!!!!!!!!!!!!!!!!!!!!

11. System Overview

12. Usability Power on indicator Simple touch-tone phone control Clear voice message Modularized control units Low power consumption

13. Central Control Unit

14. DTMF Dual Tone Multi-Frequency Most common for general telephone calls 697 123 770 456 852 789 941 *0# Hz120913361477

15. Telephone Interface Data Access Arrangement (DAA) DTMF Transceiver Audio Signals Microprocessor Telephone (RJ11) DTMF signals

16. Wireless Communication Manchester encoding –Send 1: high then low –Send 0: low then high –Data XOR with clock

17. Client Appliance Unit

18. Mechanical Aspects Motors & Gears –Gear train Slows down motor’s speed Generates more torque –Rotational motion  Translational motion Rack Gear Standard Gear

19. Appliance Module Microprocessor Actuator Or Switch Sensor From Wireless To Wireless Status Signal Control Signal Appliance Under Control Status Signal Control Signal Wireless Transceiver From CCU To CCU

20. Door Check status Lock/unlock control Press 1 at main menu

21. Door

22. Window Check status Open/close control Safety feature in case of an obstacle Press 2 at main menu

23. Window

24. Light Check status On/Off control Press 3 at main menu

25. Light

26. Heater Check temperature Temperature adjustment Press 4 at main menu

27. Heater

28. Additional Features Away mode –Automatic call back –Window changes status from close to open Check all appliance status Access code protection –Others cannot access HomePA

29. Problems Encountered

30. Motor Driver Voice Recording Wireless Synchronization Electromagnet

31. Motor Driver Before: Voltage buffer –Doesn’t work After: H-bridge –Push-pull operation –Two implementations H-bridge IC Power MOSFET

32. Motor Driver – cont’d High LeftHigh RightLower LeftLower RightQuadrant Description OnOff OnMotor goes Clockwise OffOn Off Motor goes Counter- clockwise On Off Motor stops Off On Motor stops

33. Voice Recording Before: Demo board provided by the company After: “Super” recorder made by ourselves

34. Wireless Synchronization Before: Different execution time in CCU and CAU After: Use timer and manual calibration

35. Electromagnet Before: Attraction between electromagnet and permanent magnet After: Motor and gear train Gear driven by motor

36. Business Components

37. Market Seniors People with disabilities –Blind, paralysis, leg amputation, arthritis, etc. Families aiming to improve home security Frequent travelers

38. Cost and Budget EquipmentsEstimated CostActual Cost DTMF Decoder/Generator IC$10$42 Microcontrollers$100$130 Power Supplies$30$26 Electronic Components and Sensors$80$33 Motors and Controlling Devices$300$349 Wireless Transceivers and Antennas$200$170 Total$720$750

39. Competitors Home Security System, e.g., Brinks Home Appliance Control Timer Digital Home Systems X10

40. Future Expansion Multi-lingual user interface Remote controller Additional home appliance modules

41. Conclusion Thank you for your time! Visit our website at http://www.sfu.ca/~howardc/traxtech

42. Sleepless in Lab 1? 5 AM

43. Q & A Thank you for your questions!