F12: Evil Watchdog

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Abstract

The Evil Watchdog takes the responsibilities of a pet guarding a house. It will roam around a predefined environment, avoid obstacles, and sound an alarm whenever foreign motion is detected.

CMPE 146 F12 EWD Evil Watchdog.jpg

Introduction

The objective of this project is to design a vehicle to imitate a guard dog. The following items will be incorporated to accomplish this goal :

  • Motor driven chassis
  • Vehicle will move in a random path detecting motion
  • Vehicle will sound an alarm when motion is detected

Technology used

  • Motion sensor
  • Distance sensor

Team Members and Roles & Responsibilities

  • Waymond Chen: Distance sensor programming
  • Hung Vuong: Motion sensor programming
  • Erik Montoya: Motor control programming and testing

Schedule

Starting Ending Activities Achievements
Oct 26, 2012 Nov 1, 2012
  • Acquire parts
  • Identify interfaces to be used
  • Identify pin selections
  • Review datasheets
  • Received distance and motion sensors
Nov 2, 2012 Nov 8, 2012
  • Build chassis
  • Build motors and wheels
  • Test motors and wheels
  • Prepared chassis and wheels
  • Tested motors and steering
Nov 9, 2012 Nov 15, 2012
  • Write PWM driver
  • Integrate distance sensors
  • Test distance sensors on vehicle
 
Nov 16, 2012 Nov 22, 2012
  • Integrate motion sensors
  • Test motion sensors
 
Nov 23, 2012 Nov 29, 2012
  • Integrate alarm system
  • Unite all parts
 
Nov 30, 2012 Dec 6, 2012
  • Testing and design final product
  • Complete and revise project report
 
Dec 7, 2012 Dec 13, 2012
  • Finalize and deliver project
 

Parts List and Costs

The following table will be updated as parts arrive.

ItemCost
Alarm  
ARM7 NXP LPC2148 Microcontroller $60.00
Battery  
Chassis, Motors, and Wheels $15.34
Distance Sensors (3) $25.00 ea.
LEDs  
Motion Sensors  

Design and Implementation

Hardware Design

Hardware Implementation

Software Design

Software Implementation

Testing and Technical Challenges

Conclusion

References