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The Fundamentals of a Burglar Alarm System
Summary: The most fundamental design of a burglar alarm system is just a simple electric circuit that sounds whenever a circuit is completed or broken. So fundamental that you can make one yourself.
Todays burglar alarm systems have gone a long way from being a simplistic device with a solenoid gong that Edwin Holmes has made in 1852. Todays burglar alarm system incorporates the internet and radio waves, making it really a difficult beat for burglars.
The most fundamental design of a burglar alarm system is just a simple electric circuit that sounds whenever a circuit is completed, or in some designs, broken. This action is called breaking the circuit, and other than your dog maybe the only alarm that guards your doors and windows. How do burglar alarm systems work?
In every electrical circuit, electricity flows on a completed path between two points of opposite charge, negative and positive or input and output. The circuit and the electricity is controlled by means of a switch, an on or off device where you can open or close, or reroute a part of the circuit.
So for example, in a standard circuit that consists of a power supply, a line, switch, bulb, and line back to power supply, every time the switch is turned on the bulb lights. Burglar alarm systems work that way: whenever the alarm is set on active, current passes through the doors and windows. Anyone attempting to open a door will educe the alarm.
One problem though with this design, to stop the alarm you only need to close back the door and the circuit in once again complete. Thats the function of the control box that accompanies most modern alarm system. This control box is connected to all system alarms. Once the alarm is triggered, this control box won’t cut it off until somebody manually cuts off the circuit. Subsequently, the control boxes are usually hidden and equipped with a lock so the burglar wont be able to find it.
Because this burglar alarm system is quite rudimentary, you can make one perfectly for your home. With proper knowledge of electricity you can homebrew the Break Circuit Burglar Alarm System (you may call it this way). For ideas relating to such circuits, study how refrigeration lighting comes to play.
Homebrew your Burglar Alarm System
Opening the refrigerator door emits a light. On some designs, the switch is embedded in such a way when you open the door the switch is released, completing the circuit and light goes on. Similarly, embed a press switch on a door frame. Work the circuit in such a way that the pressing will break the circuit and releasing will complete. Now attach the circuit to a buzzer.
Actually, you can imagine many uses with this circuit design. Why, try hooking it up on a disc player and invite your special someone over for dinner. Of course for the dramatic to take effect, you should let her open the door.
ADT Alarm System
The ADT alarm system is one of the leaders in providing electronic home security systems and services in the United States. The ADT alarm system features state of the art, highly advanced and sophisticated security systems and services.
The ADT alarm system is composed of security system, surveillance system or electronic article surveillance (close circuit system), fire detection system, alarm system, gaseous extinguishing systems.
The ADT alarm system is the oldest and one of the largest electronic home security companies in the United States. The American District Telegraphy Company which was founded way back in 1874 is the forerunner of the present ADT alarm systems and service. The American District Telegraphy Company originally offered simple call boxes or telegraphs. At present, the ADT has become the top electronic security company that provides security protection of the top companies, financial institutions and millions of homes in the United States.
The ADT alarm system has four levels of safety measures against burglars. The first level is the yard sign. The yard sign serves as a warning to potential burglars. Most burglars are discouraged from committing burglary whenever the house or establishment is advertised with the alarm system. The second level in the ADT alarm system is the window decals. Window decals serve as a secondary warning in case if the burglar has not noticed the yard sign. The third level of the ADT alarm system is the alarm siren. A very loud alarm siren will be triggered if unauthorized entry is detected by the ADT alarm system inside the house or establishment. The last level of the ADT alarm system is the round the clock monitoring. The ADT alarm system monitors the house or establishment twenty-four hours a day and will alert or call the local law enforcement agency if the alarm is triggered.
The ADT alarm system is monitored by highly certified staff. The ADT staffs are trained to manage emergencies such as flood, fire, and carbon monoxide poisoning. The ADT Home Security has an extensive array of equipments available, depending on the request of its clients.
The main product of ADT Home Security is alarm monitoring services. ADT Home Security maintains a centralized monitoring base that collects electronic signals from the ADT alarm systems installed in the United States. If the security system is triggered, such as an unauthorized entry or intrusion, the security system then sends off a signal to the ADT monitoring station. A monitoring specialist then checks the data that is sent by the security system and the specialist then chooses what type of response the alarm signal requires. In some cases, the monitoring specialist will contact the residence or the owner of the establishment by the use of a telephone to further investigate and determine if the alarm is false or not. If the specialist determines that the situation is not a false alarm, the local police department is then contacted.
Door Alarm Systems
One way of protection for your love ones and properties is to install door alarm systems in your home or establishment. Door alarm systems provide additional protection against intruders or unwanted guests. Door alarm systems are basic security alarm systems.
The most commonly used devices for door alarm systems are magnetic switches and contact switches. Most door alarm systems have door chimes; microphone and speaker systems. Some have close circuit surveillance cameras. Door alarm and chimes enables the occupant of the house or building to identify who is on the other side of the door. While the microphone and speaker system enables the person on each side of the door to communicate with one another, the surveillance camera enables the occupant to see the physical appearance of the guest or intruder.
Some door alarm systems are equipped with passive infrared system which detects movements in the vicinity of the door. Some door alarm systems even have keypad that has a programmable security code which a wrong code if keyed in will set off an alarm like a siren accompanied with flashing lights. Some door alarm systems have automatic latching devices, which will automatically lock the door if the alarm is set off. In case the alarm is set off accidentally the owner must key in the security code to disengage the alarm.
Having a loud audible alarm is an effective way to discourage burglars. Catching attention is what burglars avoid.
There are three types of contacts for. These are recessed contacts, surface mount contacts and roller ball contacts. Recessed contacts are the types that are concealed in door jams. The surface mount contacts have the same function as recessed contacts; these contacts are not hidden. The roller ball contacts are placed on the hinge side of the door.
All three types operate on the same switching principle where an electrical circuit activates the alarm as the door is opened breaking the circuit.
Always remember that the most common entry on every structure (be it a building or a house) is through the door. Hence, the importance of door security alarms.
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