How to set security alarm
The GSM Based Security Alarm system promise to be The Big Thing in the security space. Lets take a very general security scenario. The major problems faced with simple Security alarm system are-
1) Response time is too high.
2) The thieves may cut the telephone or Speaker wire
3) How does it communicate the alarm to me?
4) How does it inform me that it is not safe to enter my house?
5) How do I know if all the devices are working and which zone is not active?
6) How will the burglar react if he hears the hooter, will I be in more danger?
The answer to all these problems is the GSM Based security alarm. These problems can also be seen as a loopholes in the present security system. Ask yourselves- does your security system gives answers to all these problem? What if you get all these features without any internet or special devices to be carried with you at all times. Thats right, With GSM alarm system your Mobile phone will acts as your alarm station. Multiple authorised personnel can receive these alert and alarm. Different zones can be programmed to send either SMS or Call the pre-feed numbers. By sending and receiving SMS, the remote system can be connected to the Central Monitoring station. The possibilities are endless and seamless.
One of the first of its kind alarm system is launched by Digitals India in India. The New Guard MC G+ is an eight-zone integrated detection panel which integrates wired/wireless security accessories like magnetic switches, panic switches; night devices like PIR sensors, IR sensors and fire accessories like smoke detectors into a common control panel. This system has several G+ advantages over the conventional systems like GSM connectivity, System health status, CMS, easy arming/disarming. Its sleek design and user-friendly operation will also appeal large segment of business owners and home owners.
The NEW GUARD MC G+ has dual function of GSM/ PSTN Line. It can send health check SMS, call and deliver prerecorded message, integrated to CMS and generate reports. Earlier systems were purely PSTN based and they were prone to wiring damages or stagnant telephone exchanges.
Through new Guard MC G+ the banks can control and monitor large numbers of bank branches through a simple CMS interface. They can not only receive alarm alerts but will also be able to keep track weather the system is night armed, set preset timings, reset alarms, System health and generate reports at the same time. Company also plans to setup CMS stations at all 22 service centers across India in coming years.
This alarm gives a 15-20 second exit and entrance delay. After being triggered, the alarm sounds for five minuted and then shuts off. Once triggered, the sequence is automatic and not affected by subsequent opening or closing of doors.
Thwart any attempt of burglary in your house using this alarm circuit. When someone opens the door of your room, it sounds an alarm intermittently and flashes light as well. The circuit can also be used as an audio/visual alarm in case of fire or other emergency by momentarily pressing switch S3.
The circuit (refer Fig.1) is built around transformer X1, a standard bar magnet, reed switch S2, timer IC NE555 (IC1), opto-coupler IC MOC3020 (IC2), TRIAC BT136 and a few discrete components. Timer IC1 is wired as an astable multi-vibrator whose reset pin 4 is controlled by the reed switch. The reed switch fitted in the door frame acts as the sensor. A magnet is fixed on the door panel close to the reed switch.
The reed switch consists of a pair of contacts on ferrous metal sealed in a glass envelope. The contacts may be normally-open (which close when a magnetic field is present) or normally closed type (which open when a magnetic field is applied). A normally open- type reed switch is used here.
When the door is closed, reed switch S2 is in open state. When the door is opened, the bar magnet moves away from reed switch S2. As a result, reset pin 4 of IC NE555 goes high. The high output at pin 3 of IC1 enables IC2. Pin 4 of IC2 is connected to the gate of TRIAC1. When the door is opened, bulb B1 flashes and the bell sounds (provided switch S4 is closed) indicating that the door has been opened. Flashing of the bulb and the alarm continue until the door is closed. Get more details
