Design and simulation of the auto-control system of classroom lights

Focusing on the increasingly large energy loss of lighting power, this paper introduces a kind of practical auto-control system of classroom lights. This system will adopt the combination of MC-S20T180NO opposite type photoelectric switch, DC Solid Relay and middle and small scale integration 74LS47, CD40192, etc. It will take Multisim10 simulation software as the design platform. Through the circuit design and simulative experiment, the system can automatically control the lights according to the variations of environment illumination and the amount of people in the classroom. Each performance index has reached the design requirements. It has quite strong adaptability to all kinds of classrooms in universities, middle schools and primary schools. It has got actual promotion values.