Vu Duong, Francisco Godinez, Priest Meng, and Daniel Depew

1
Telecom Enabled Door Locking System
Vu Duong, Francisco Godinez, Priest Meng, and
Daniel Depew
vld062000_at_utdallas.edu, fjg031000_at_utdallas.edu,
plm031000_at_utdallas.edu, dgd041000_at_utdallas.edu
Department of Electrical Engineering Erik Johnson
School of Engineering Computer
Science University of Texas at Dallas Richardson,
Texas 75083-0688, U.S.A.
Project Goals
Project Results

• Design and build a device that controls a door
  lock system and allows access to the system using
  any phone
• Provide a device that must work with all
  compatible telephone service providers
• Create a device that is both user friendly and
  will prevent unauthorized entry
• Minimize budget costs to expand availability for
  average consumers

• PSpice Schematic
• Bridge rectifier to control first Ring Detector
• DTMF decode frequency input from caller
• Door Lock controller from microcontroller
• Playback Message
• Off-Hook Circuit control by Microcontroller

Project Overview

• Microcontroller Program Flow Chart

• Microcontroller testing with Parallax Software
• Program controls circuit
• Memory and passcode holdings displayed

• Research and Design
• Collect ideas on device operations and create an
• operation flow chart
• Research POTS systems and telephone lines
• Research electromechanical door lock systems and
  security
• Collect general data on the various components
  used
• in our device
• Learn and understand microcontroller software
  programming
• Select specific components used in project based
  on our
• device specifications
• Finalize general circuit design
• Write and debug microcontroller program using
  BASIC software
• Test microcontroller using test circuit
• Function of Locking System
• Security with password projection
• Instance voice message response
• Less power usage
• Organization
• Materials

Project Conclusions/Outcomes

• Although we have yet to fully construct the
  crucial microcontroller for our system, we have
  successfully designed and tested on a basic
  parallax circuit board shown, whose functions can
  easily be converted to that of our proposed
  microcontroller assembly
• The completed microcontroller shall govern all
  the collective circuit components ring detector,
  off-hook switch, DTMF, playback message, and
  door lock system
• An overview of our work-in-process includes the
  initial circuit from PSpice, flow chart, and
  complete assembly of operative microcontroller
  programming codes
• In Senior Design 2, we will be able to completely
  simulate our system design as well as detail
  results