Abstract
Security is primary concern for every one. There are many ways to provide security at homes or in industries. But what if the security is assured irrespective of the person is inside or outside the house. This Project describes a design of effective security alarm system that can monitor an industry or house with different sensors using RF.
Wireless Security System is a security system using RF that monitors the status of each sensor at the transmitter side and displays this status at the receiver end. This project is mainly useful in homes, industries etc to continuously safeguard homes and industries. The RF transmitter and receiver can be placed anywhere within 100 meters since the range of RF modules used in this project is 100 meters.
The status of these different sensors can be monitored continuously and this status is transmitted using RF Transmitter. The response of these sensors is read at the receiver end. Whenever any of the sensors is triggered or activated, the response can be identified at the receiver side and immediately the burglar alarm will be activated and the system calls to the predefined number. The system dials to the number already stored in the system. Thus, the person associated with this system receives the call from the system and can proceed with the necessary action.
The RF modules used here are 2.4GHz UART. RF Transmitter is connected to the different sensors. This encoder converts the 8-bit data into a single bit and sends it to the transmitter which will be transmitting. The data which is in the air is an analog value. At the receiving end, the receiver receives this analog value on a single data line. Receiver it converts the single bit data into eight bit data and gives it to the microcontroller which does the further processing.
SOFTWARE AND HARDWARE TOOLS:
Software Tools:
- Keil compiler
- Orcad.
- Proload
Hardware Tools:
- Microcontroller AT89S52.
- RF UART MODULE
- MAX232
- Sensors- temperature (LM35), gas, fire, reed switches, vibration, LED-LDR pair, IR transmitter and receiver
- Buzzer and driver circuit
- LCD
- Auto-dialer
Block diagram:
Transmitter section
RECEIVER SECTION
