1. A utomatic P et D oors Adding Safety and Convenience to Your Pets Entrance

2. Automatic Pet Doors Adding Safety and Convenience to Your Pets Entrance Meet The Project Team Zack Butler Andrew Hitchen Liz Drover Shanna Nolan

3. Automatic Pet Doors Adding Safety and Convenience to Your Pets Entrance Abstract – Introduction Problem to be Solved Millions of homes in North America have pets which require a route in and out of the home for various reasons Existing pet doors have flaws that we have endeavoured to overcome with our design

4. Automatic Pet Doors Adding Safety and Convenience to Your Pets Entrance System will allow the pet to independently open the door for entering and exiting the home System must be able to lock when not in use System must fit in the dimensions of a standard exterior door System must be internally powered by batteries System must be aesthetically appealing Project Objectives

5. Automatic Pet Doors Adding Safety and Convenience to Your Pets Entrance Initial Design Review Weight activated sensors Tedious installation Difficult for weather proofing Obstructions created by door

6. Automatic Pet Doors Adding Safety and Convenience to Your Pets Entrance Early Revisions In Design Horizontally mounted stepper No longer attached to door Weather proofing Mounted sensors Battery operated Easy installation Eliminated obstructions

7. Automatic Pet Doors Adding Safety and Convenience to Your Pets Entrance Final Design 12 x 15 pet door dimensions Spring loaded solenoid lock Door locks when system is off Easy access for battery replacement Weather proofed

8. Overview of Final System Hardware Assorted Lumber ½ Wooden Dowel Vinyl Sheet Weather Stripping Rubber Matting Wires Terminal strips Various Fasteners Accessories Electronics Normally open buttons Solenoid 6 x 1.5V D-Cell Batteries PIC 16F877 Microcontroller Lin Engineering Bi-Polar Stepper Motor Software C-Language Code PIC Downloader Microchip MPLAB Project Builder

9. Automatic Pet Doors Adding Safety and Convenience to Your Pets Entrance Wiring Schematic

10. Programming Flowchart

11. Automatic Pet Doors Adding Safety and Convenience to Your Pets Entrance Demonstration

12. Automatic Pet Doors Adding Safety and Convenience to Your Pets Entrance Obstacles & Trade-Offs

13. Modeling of Motor

14. Recommendations A microcontroller circuit designed specifically for a stepper motor would take up less space. This would allow better fit into a standard exterior door. A stepper motor with smaller dimensions and more torque would completely fit inside an exterior door, while being able to lift a pet door that was made of a heavier, sturdier material. Place bearings on the contact points of the lifting shaft. This would maintain adequate support, but would facilitate motor rotation with less friction, thereby increasing efficiency of the system.

15. Conclusions Technical and Professional Skills Acquired Programming Circuit design and wiring Design for constructability Organization and documentation Goals Accomplished Designed a pet door system that allows a pet to independently enter and exit the home by touching a sensor pad with their paw The system was implemented within the standard dimensions of an exterior door The system features a lock for safety and security

16. A utomatic P et D oors Adding Safety and Convenience to Your Pets Entrance www.engr.mun.ca/~hitchenu