Abstract
The infrared voice alarm system is composed of a central controller, infrared sensors, voice-activated sensors, alarm devices and keyboard parts. Controller using microcontroller AT89C52, infrared sensing part of the integration of infrared transmitting and receiving electro-optical sensors TCRT5000, voice-activated sensor part of the use of electret microphone, speakers and light-emitting diodes as the alarm equipment. Microcontroller through the infrared sensor part and the voice-activated sensor part of the coming changes in the signal to determine whether there are outsiders, if sent through the speakers or the diode to the police; infrared sensors, infrared emission through the launch tube to the receiving tube, two between elements of a connecting via infrared, when there are objects stand in the middle, they then pass on the changes in level microcontroller; Similarly, voice-activated sensor is converted into electrical signals into acoustic signals and then transmitted to the microcontroller; keyboard is used to set the alarm trigger conditions. Keywords:microcontroller; assembly language;infrared sensor;
voice-activated sensor; AT89C52
