Oct 2011

home security systems wireless

review home security systemsIf the home owner activates the alarm system and the control center registers activity in the home, a signal is sent by the control to a buzzer, flashing lights or any other audiovisual alarm element. Our design for a functional keypad was the usage of an alternation of ports between inputs and outputs which is done by using the TRIS function. We started off by setting the first four ports of PORTB as the inputs and the latter four ports as the outputs. The first four ports are connected to the columns meanwhile the last four are connected to the rows. Moreover, as a justification for this reasoning is the fact that it is required to scan the columns for the pressed key and then scan the rows and the results will be decoded in a decoder telling us which button of the keypad was pressed. The main functionality of the keypad as mentioned earlier is to set the code. The alarm can be armed and disarmed with a standard four digit user code in our case. The master code is a step above a regular user code. It is used to unlock the system, as well as programming or erasing a regular user code. Theoretically it can also be used to bypass some sensors. The default password set during the design, which is also the installation code, is 1234.

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Oct 2011

home automation installation

alarms for businessA. , icks, T. A. , Van Meter, C. W. 2000. Chapter 8: Crime and the threat environment. Principles of security and crime prevention, 4th ed. Cincinnati, OH: Anderson Publishing. Friedman. …… Private SecurityThe various factors that influence both the definition and the perception of private security are typically environmental but can be internal and external to the issue of security itself.

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