Security Alarm

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Home security alarm system

What is Home Security Alarm System?
Apparently, it is an alarm system installed at home for the sake of security. It is designed to detect intrusion.

An ideal security alarm system consists of a combination of devices for exterior (or perimeter) and interior protection. Let's look into what the perimeter protection and interior protection are.

Perimeter Protection
Generally consists of sensing mechanisms attached to doors and windows leading into the property. These devices are connected in such a way that they will sound the alarm if an entry is attempted and will send an emergency call for help to an authorized person or central monitoring center. 

The most widely used device for this protection is magnetic contact (i.e. a switch and a magnet), which works with a switching mechanism. The switch is placed on the frame of a door or window, and a magnet is placed on the door or window adjacent to the switch. When the door or window is opened, the magnet moves away from the switch and the alarm will be activated. In the event that an intruder attempts to bypass the magnetic contacts by breaking the glass at the door or window, device like shock sensor can sense a shock at the monitoring object and send out RF alarming signals to the main unit.

Interior Protection
Interior Protection system plays an important role to detect if an intruder has eluded the perimeter security system.

The most common device used for interior protection is motion detector, which can detect body heat or movement of an intruder and activate the alarm. There are three basis types, infrared, microwave, and ultrasonic.

Smoke detector, as an indicator of fire, is another essential device for interior protection. Smoke detectors can sense the presence of smoke particles in the air. They should be located in all levels of the property.

There are many other security devices, such as IP camera and panic button, which can make the alarm system protection more complete.

Installing a home security alarm system in your property can help reducing your homeowner's insurance premiums, but most importantly, a good home security alarm system can protect your family and prevent your property from being robbed or intruded.

How to Build an Alarm Circuit

Building an alarm circuit is one of the easiest circuits to make. There are two type types of alarm circuits: a closed-circuit system and an open-circuit system. Here are the steps to construct a closed-circuit system alarm.

Instructions

Things You'll Need:

• Battery
• Clip
• Buzzer
• 3 pieces 5-inch wire

1. 1

Prepare your wires. For the circuit to have clean contacts, you'll need to peel off the wire insulation at the end of the wires. Peel off ½ inch of insulation for the wire ends that will attach to the battery. Peel off 1 inch of insulation for the wire ends that will attach to the clip.

1. 2

Connect the buzzer to the switch. In a closed-circuit system, the only time the alarm will not ring is when the circuit is broken. This means that whenever the electric current is moving along a continuous route, the alarm will sound. Start out by attaching one piece of wire to one of the buzzer terminals. Attach the other end of the wire to one prong of the clip by wrapping the wire around the prong tip.

1. 3

Connect the switch to the battery. Take a second piece of wire and wrap the end around the second prong on the clip. Make sure the wires are touching when the clip is closed. This is the part of the circuit that opens and closes. Connect the other end of this wire to one of the battery terminals.

1. 4

Connect the battery to the buzzer. At this point, you might want to stick a thin piece of plastic, or cardboard inside the clip to keep the wires from touching. Otherwise, the buzzer will keep ringing once the battery is connected to it. Take the third piece of wire and connect an end to the other battery terminal. Connect the other end of this wire to the remaining terminal on the switch.

1. 5

Your circuit is complete. Pull the cardboard piece out of the clip, and the buzzer should go off. If the buzzer doesn't go off, check your battery terminal and buzzer terminal connections. Also make sure the clip wires are touching when the clip is completely closed.

Tips & Warnings

• Make sure your battery source is strong enough to power the buzzer, but not so strong that it burns the buzzer out.
• Use a plastic clip or a metal clip with plastic ends to avoid getting shocked by the current.

 

In the past, only the very rich could afford home security at home.

Nowadays, home security won't be a luxury any more. It has become a necessity and is critical to home protection as well as family safety. Certainly, it is more affordable.

 

You may ask why I need home security system. Here are the 5 main reasons.

1. It saves lives

With smoke detector, fire detector or gas detector included in your home security system,you are informed when the siren is being initiated. You can act in order to prevent any fire from happening.

2. It protects your homes and families

Obviously, a home alarm system can against a break-in or burglary. Essential parts in a system includes motion detectors and door/ window contact sensors.

3. It provides peace of mind

You don't need to worry about your home safety when you are on vacation. With autodial/SMS function, you will be notified if there is irregularity at home. You can also monitor your home by IP camera though internet.

4. It minimize damage to personal property

Discover earlier and the damage can be minimized.

5. It reduces insurance premiums

Have a home security alarm system installed can actually lower your insurance premiums.

 

So, why you need home security system? A study at temple University tells that a home without a security system is three times as likely to get broken into. Most of the break in crime are not elaborately planned. A burglar generally looking for a speedy entry and exit. With a home alarm system, you can be notified about his entry immediately and act accordingly.

 

Above all, a home security system is one of the best deterrents to property crime that you can own.

 

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