摘要:Personal home security system is a tool designed to provide information tohome owners, if there is disruption or unexpected visitor's arrival. The securitysystem of the device can detect the presence of someone, because the sensorphotodiode placed on the places that have been determined. Placement of thesensor is mounted 50cm measured from the floor of the house, aiming to avoidanimals that come into the house, such as cats and similar animals. In this safetysystem is a safety system that is still simple; because the output is displayed onthe 7-segment displays a number. Figures are shown in the seven-segmentdisplay to give the sense that there was interference with the sensor is displayedon the seven-segment display.