Data Acquisition Circuit of the Energy-saving Controller in Classroom

The Energy-saving controller can control the light intelligently by recognizing and judging the existence of the human body and ambient light, and avoid wasting a lot of electricity. Classroom environment light and the present or not the body are two important input parameters of the energy-saving controller. This paper designs two circuits which are light signal acquisition circuit and human existence optical sampling circuit. And the software program of the data acquisition circuits, also point out the specific requirements to the sensor´s installation.