RFID Smart Home System by yk6k8j2

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									David Meyers, Jared Santinelli, Phillip Robinson,
                 Nazar Trilisky




         Georgia Institute of Technology
  School of Electrical and Computer Engineering
                October 23, 2008
   Goal: Prototype of an RFID-based access control
    system featuring adaptive lighting

   Target Customer: Builders and developers of Multiple
    Dwelling Units (MDUs)

   Motivation: Increase security and convenience while
    saving money

   Target Cost: Prototype < $500
   Provide automated entry/exit and identification using RFID

   Supply the ability to track occupants within a database

   Automate hallway lighting dependent upon user
    destination

   Turn on foyer light based on current natural lighting
    conditions

   Use electric door strikes to lock doors for security
   Basic Layout
     Red- “Entrance/Exit Module”
     Green – “Room Module”
Phidget RFID Reader (USB)
  Board Dimensions: 6.8 x 8.1 cm
  EM4102 Passive Tags @ 125 kHz
   (Read Only)
  Read Range (depends on tag type)
   ▪ Vertical: 0.5 in to 4 in
   ▪ Lateral: 0.5 in to 2 in
  Min Distance Between Readers: 1 m
  Available +5 VDC and LED Output
   eBoxII
   Available Interfaces
     3 USB ports – For RFID Reader Communication
     1 RS-232 port – For Microcontroller Communication
     1 Ethernet
     1 Monitor Connection
     PS/2 Mouse/Keyboard Connection
   OS/Application languages
     Windows CE 6.0
     C/C#/C++/Java
   CY8C29466-24PXI
     19 Digital General Purpose I/O Pins
     Maximum 80 mA combined IOH budget
     VOH = Vdd – 1 V = 4 V Min.
     VOL = .75 V Max.


   Interfaces
     eBox: RS-232 TxD Pin #3  Rx8 Serial Reader
     Circuit: I/O Pins wired to transistors
   Door Strike (SD-995C)
     Triggered with 7.3 V differential
     Fail-safe or Fail-secure modes

   Relays
     Operate at 80-100% of specification voltage
     DP-DT increases scalability

   Photovoltaic Switch
kc7786 - Passive Infrared Sensor (PIR) module
         Lens angle: 60° vertical, 100° horizontal
                                                     Created
                                                     from +12
                                                     VDC using
                                                     555 timer




                C1 and R3 determine
                timing characteristic
Problems                          Solutions
Motion detector has very small    Used operational amplifier to
output voltage                    increase signal level
Need to create -12 VDC supply     Used 555 timer
from +12 VDC
LCD display on EVAL board not     Using LEDs for debug
working
Receiving RS-232 input on         In Progress: adjusting timer,
Microcontroller                   voltages, and parameters of
                                  Rx8 module
Errors when building OS solutions In Progress: working with lab
for eBoxII                        TAs to troubleshoot
                                          Test 1: Invalid Tag
                                          Test 2: Valid Tag
                       Room Door
      Light On          Unlocks                   Room 1
      1   Room Door                       Test 3: Valid Tag
                                                  Room 2
Hallway                            Main
                 Lights On         Door
                                            Main Door
                                            Main Door
                                            Remains
                                              Locks
                                            Unlocked
                 Lights On                   Locked




           2
   Cost Analysis:
     Prototype Cost – Approx. $451.97
     Target Price for 50-unit building - $38,600.00
     Based on 490 units sold, 5 year profit - $1,090,119.00


   Current Market:
     Non-Integrated Devices - ~11% cheaper, less flexible
     Best Buy ConnectedLife.Home - $15,000 for typical 3-
      bedroom family residence
   Complete
     Design and Theory
     Initial Component Testing
     Motion Detector/Timer Circuit

   In Progress
     eBox Software Testing (11/12/08)
     Circuit/Simulation Environment Construction (11/12/08)
     Microcontroller Software Testing (11/12/08)

   Planned
     System Integration and Testing (11/12/08 – 11/28/08)
     Ready for Demo and Presentation (11/28/08)

								
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