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Smart Home: RFID Access Control and Automated Lighting System

David Meyers, Jared Santinelli, Phillip Robinson, Nazar Trilisky. Smart Home: RFID Access Control and Automated Lighting System . Georgia Institute of Technology School of Electrical and Computer Engineering October 23, 2008. Project Overview.

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Smart Home: RFID Access Control and Automated Lighting System

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  1. David Meyers, Jared Santinelli, Phillip Robinson, Nazar Trilisky Smart Home: RFID Access Control and Automated Lighting System Georgia Institute of Technology School of Electrical and Computer Engineering October 23, 2008

  2. Project Overview • 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

  3. Design Objectives • 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

  4. Design Overview • Basic Layout • Red- “Entrance/Exit Module” • Green – “Room Module”

  5. RFID Component 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

  6. eBox Device • 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

  7. eBox Software Flow

  8. Cypress Microcontroller • 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

  9. Microcontroller Software Flow

  10. CircuitryMicrocontrollerRelays, Door Strike • 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

  11. CircuitryMotion Detector & Timer 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

  12. Problems and Issues

  13. Demonstration Test 1: Invalid Tag Test 2: Valid Tag Room 1 Room Door Unlocks Light On Test 3: Valid Tag Room 2 1 Room Door Hallway Main Door Lights On Main Door Remains Locked Main Door Unlocked Main Door Locks Lights On 2

  14. Market & Cost Analysis • 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

  15. Project Schedule & Current Status • 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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