Week : 7

Title : Block diagram for home security system

Objectives :  Describe the function between input stage, controller stage, and output stage

Contents / Procedures :

Figure : Block diagram for the home security system

  

Results / Analysis :

 The inputs stage of the security system is the motion detector, keypad, and magnetic sensor. The second stage is the controller unit which is the picf877a. The purpose of using picf877a is to control the whole system operation by sending data to the output stage which is the LCD display, relay,buzzers,and pepper gas spray.Password door security and pepper gas spray as additional feature to complete the system.

Conclusion :

The hardware development is divided into three stages as shown in block diagram above.