wireless security

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.

security door locks

As soon as we connect the 5V power source the alarm greets us with a welcome message displayed on the LCD then asks us to provide the password.

burglar alarms company

Burglary Facts and Statistics 2008.

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The private security business also installs complete home security automation, conducts private investigations, screens prospective employees, and provides security consultation to corporations.

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etrieved September 26, 2007 from ASIS International.