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Window Contacts: Can be hardwired or wireless. Motion Sensors: It’s the most essential and common form of protection. Passive infrared sensors: Detect motion by sensing a sudden change in heat. Dual Tech motion detectors use two different technologies in the same unit: passive infrared and microwave. These devices are designed to avoid false alarms since both technologies must detect motion before setting off the alarm. Photoelectric Sensors: These sensors project a beam of light across a hall or doorway to detect motion and are triggered when a person passing through interrupts the beam. Glass Break Detectors: Usually mounted near windows to detect the specific high frequency sound of glass being shattered. They are usually installed on a wall opposite or adjacent to the protected glass and are effective within about 15′ to 25′. Smoke and Heat Detectors: Detect smoke and heat. Chapter II:Our Home Alarm SystemOur Home Alarm System:Our project’s main concern was to build a Home Alarm System using a PIC microcontroller. We started off our project by coding the Keypad, then LCD and the final touch was the sensor.

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On one hand, the siren lets intruders know that police have been alerted, which may deter them from taking any further action, while some intruders may still proceed.

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Home, Secure HomeThe most deluxe new apartments are now being built with top of the range ultra modern security systems as a main selling point.

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Not only will you consider the characteristics of the window, such as double hung or slider, you also have to … What Windows Will Fit Your Home and Personal Style Best?» Online Personal Styling customized for you and your lifestyle.

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We started off by setting the first four ports of PORTB as the inputs and the latter four ports as the outputs.