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1. Design of Concealed Alarm System Based on GSM
Abstract:
The alarm system described in this paper is mainly used in banks, residential quarters,
warehouses, hospitals and so on. These areas require remote alarm or emergency situation alarm
very much. Especially banks are prone criminal area of cases, sometimes bank staff cannot alarm
timely or cannot alarm, so that the property of our country may fall into the pocket of criminals,
and the life and health of bank staff’s may be hurt by the criminals. But this system solves these
problems very well, in the event of criminal cases, once step the foot-button to trigger alarm in
the main control area, or use the remote control wireless FM network to transmit a trigger signal
to the microcontroller in other monitoring area can both achieve alarm and monitor of the
criminal. This intellectualized GSM-based alarm system has the characteristics of diverse alarm
way; easy concealment; and may realize alarm over mass, thus achieves the safeguard of the
financial network security.
Existing System:
In existing system, there is nothing has been improved for monitoring the robberies in
the banks or some other places. So we go for the improved and GSM based proposed system to
overcome the disadvantage in the normal existing system.
Proposed System:
In proposed system, the security system will contain the 8051 microcontroller, IR
transmitter and receiver, buzzer, and GSM modem. The keys will be connected with the system
to intimate about the robbery. When the key pressed, then the alert message will be sent to the
corresponding number via GSM modem. IR transmitter and receiver will be always in
communication and placed in the restricted area. When the IR cut by someone then the message
will be sent and alert the person.

2. Block Diagram:
Power
Supply
MAX232
Key1
Key2
Key3
IR
transmitter
IR
receiver
Hardware requirement:






8051 microcontroller
Keys
IR transmitter and receiver
MAX232
GSM Modem
Buzzer
 LCD
Software requirement:
 Keil Compiler
 Embedded C
Advantage:
 Fast response.
8051
Micro
controller
GSM
Modem
LCD
Buzzer

3.  High Security.