BuzzCard Access System for Westminster Christian Fellowship

Ayush SamantroyDan van Kley

Adam SakautzkyMatt Habib

ECE 4007 L01

April 23, 2008

Overview

• Magnetic card access system• Scheduling abilities• Database of active users• Audit trail• Web-based administration• Total cost for 5 doors including labor: $8,299

Technical SpecificationsProposed

• ISO 7810/7811 compliance• 5 second response time• 5% false negative rate• Automated offsite backup• 12 hour battery backup

Achieved• ISO 7810/7811 compliance• 1 second response time• 3% false negative rate• Manual offsite backup• 12 hour battery backup• Scheduling

System Layout

Power Source

Regulator Circuit

SBCDoor Strike

Magnetic Card

Reader

12V 5V

12V5V

Data

Power

Capture and Compare HashMagnetic card

is swipedSBC receives

card information and generates

MD5 hash

Compare hash to access list

Log Entry and Access Control

Hash and entry information is logged

If entry is allowed, strike will open for

5 seconds

Enter User Information

Have user swipe magnetic card at door

Obtain swipe information via entry log and add to

user list

Power Schematic

Demonstration

Objectives:• Allow access with valid card only• Generate accurate access log• Administer system via web browser• Operate system on battery backupQuality Assurance:• Test false positive/negative rate

Schedule

• 1/28 – 2/18 : Configured SBC– Interfaced with laptop over FTP/Telnet

• 2/20 – 4/14 : Developed backend program– Wrote C code for integration with readers/strikes

• 3/10 – 4/16 : Developed web interface– Set up web server to interact with CSV files

• 4/23 – 5/2 : Installation– Install SBC, card readers, and door strikes

BudgetComponent Projected Actual

Magnetic Card Reader $150 (ea.) $117 (ea.)

Technologic TS-7250 SBC $150 $119

Electric locking mechanism $150 (ea.) $24 (ea.)

Electric wiring $100 $25

Conduit $50 $50

Enclosure $180 $150

Backup lead-acid battery $60 $50

Labor Cost ($30/hour x 30 hours/week x 8 weeks) $9,600 $7,200

TOTAL (for one door) $10,440 $7,735

TOTAL (for five doors) $11,640 $8,299

Current Status

Completed:• Fully featured backend

program• Web interface• Testing of integrated

system for multiple doors in lab

Pending:• Repair/replace

malfunctioning SBC• Install hardware at WCF• Establish automated

offsite backup• Test installed system for

all doors

Future Improvements

• Implement a SQL database on SBC• Implement hardware interrupts• RFID integration• Integrate with alarm system at building• Add a magnetic lock with egress system

Questions?