As the world is developing the need for electronics in human endeavor is now taking a larger scope. With the invention of certain electronics gadgets in our societies today, certain activities become easily handled for example; in communication where the telephone plays a part. In places where safety are needed an alarm system will be of much important. The application of electronics in this modern age is simply inexhaustible and this group form more interest in the alarm system after negotiating the increase in the case of burglaries in homes, cars, etc. The selection of a proper alarm is not a simple matter because the need of each individual home owners or businessman is different like a set of finger prints. Some factors and question which must be answered when selecting an alarm system include:- a. What system need be protected? b. What type of sensor are needed? c. The method of transmission needed for the alarm signal The purpose of producing the intruder alarm system is to limit this effect of the criminology in the society by informing us that our property are in danger. All these will bring alarm the way by which criminal break into private properties by searing them away once the alarm is trigged.

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