摘要：Non safety system is a tool designed to provide information to home owners, ifthere is disruption or unexpected visitors arrival. The security system of thedevice can detect the presence of someone, because the sensor photodiodeplaced on the places that have been determined. Placement of the sensor ismounted on the back door or windows of the room, which aims to avoid theoften we open the doors or windows that can operate the tool if we are notdeterred by the accident. Therefore, it is suggested that the device in use at nightto avoid unintentional interference. This security system is a security system thatwas simple, because the output is displayed only in the form Led and Buzzeralone.
