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Smart Lock Systems
The document describes the design of a low-cost electronic lock and key system using an Arduino Uno microcontroller. The goal was to create a secure door locking system that is affordable, easy to use, and electronically controlled. The lock side uses an Arduino, XBee wireless module, IR obstacle detector, and solenoid lock mechanism. The key side also uses an Arduino and XBee. When the key is within 30 meters of the lock, the solenoid will unlock the door. Some advantages are better security, low maintenance cost, and an alarm can be added. Potential applications include home security systems and automobiles.
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Introduction by presenters P Priyananka and B Bootnnyy S Srrininaatthh.
Identifies the need for affordable, secure electronically controlled locking systems for doors and vehicles. The goal is to create a user-friendly, reliable lock system.
Presenting block diagrams illustrating both the lock side and key side mechanisms essential for the project.
Describes the Arduino Uno features: ATmega328P microcontroller, power requirements, processing speed, and input/output capabilities.
Detailed specifications of the ATmega328P microcontroller including memory, architecture, and operational voltage.
Xbee module features: operating range, communication frequency, and interface type, essential for wireless functionality.
IR based obstacle detection with sensitivity settings and voltage specifications to enhance the locking mechanism.
Details the solenoid coil specifications needed for the locking mechanism to function effectively.
Schematic representations showing the technical layout for both lock and key sides of the system.
Outlines advantages: superior security, user-friendliness, low maintenance costs, and impressive affordability.
Addresses limitations like continuous power consumption and potential user error in locking mechanisms.
Describes applications of the locking system in homes, banks, police stations, and automobiles.
Discusses enhancements such as RFID technology, wireless power transfer, mobile integration, GPS tracking, and biometrics.
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Smart Lock Systems
- 1. By By PPrriyiyaannkkaa B Boottnnyy S Srrininaatthh
- 2. Need and Goal Need •Electronically controlled lock and key systems are quite expensive •Security has been a concern for main doors and cars Goal •To provide a secure, low cost door lock system •To provide a foolproof, easy to use, electronically controlled security system
- 3. Lock Side BlockDiagram
- 4. Key Side BlockDiagram
- 5. Arduino Uno •ATmega328P microcontroller • 16MHz Crystal Oscillator • USB connection • ATmega8U2 for USB-to- TTL conversion • 14 Digital I/O Pins • Input Voltage: 7-12V • Power Supply: USB or External Arduino Uno Front Arduino Uno Rear
- 6. ATmega328P • 8-bitMicrocontroller • 28-pin PDIP • Up to 20MHz @ 1.8 - 5.5V • Advanced RISC Architecture • 32KB Flash Memory • 2KB SRAM • 1KB EEPROM
- 7. Xbee (ZigBee) Module • Range up to 30m • DSSS (Direct Sequence Spread Spectrum) • Frequency of operation – ISM 2.4GHz • Uses serial UART interface to communicate XBee Module
- 8. IR Based ObstacleDetection • Sensitivity up to 30 cm (Adjustable) • Operating Voltage – 5V • Adjustable Range with Potentiometer • Logic Output – Binary 1/0 (5/0V)
- 9. Lock Mechanism •Solenoid coil • 7.5V, 2.5A • Uses magnetic fields to operate on the steel rod
- 10. Lock Side SchematicDiagram
- 11. Key Side SchematicDiagram
- 12. Advantages • Bettersecurity compared to conventional electronic locking systems • Easy to use. Shut it and forget it! • Low maintenance cost • Cannot be easily duplicated • Alarm system inbuilt • NRE cost of the product is Rs. 500 ($10)
- 13. Limitation • Continuouspower consumption • Easy to lock oneself out (if the key is left inside)
- 14. Applications • Homessecurity locking systems • Banks, Police Stations and high security buildings where single entry is permitted • Automobile Lock System at low cost
- 15. Further Enhancements •RFID (Radio Frequency Identification) usage on the key side • WiTricity – Wireless Electricity Transfer to reduce power consumption • Integration with portable devices like mobile phones • GPS for key tracking • Biometrics and Touch Screen Interfaces