Home Security System are used throughout the United States, people know what Burglar alarms are and what they are used for. Nevertheless they may not know how they operate. Let?s see how this protection system works in detail.
The Circuit
Home Security Systems are a simple electric circuit. To open or close a light, you simply throw a switch. In a burglar alarm it?s the same except the switch detects the movements of the intruder such as the opening a door or window.
Two categories
In a closed-circuit system, the electric circuit is closed when the door is shut. This means that as long as the door is closed, electricity can flow from one end of the circuit to the other. But if somebody opens the door, the circuit is opened, and electricity can’t flow. This triggers an alarm.
In an open-circuit system, opening the door closes the circuit, so electricity begins to flow. Also in this system, The Alarm is triggered when the circuit is completed.
Magnetic sensor
A magnetic sensor in a closed circuit consists of a few simple components.
– a battery powering a circuit
– a spring-driven metal switch built...
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