我国交通法规规定,汽车在夜间会车时,必须用近光灯,而在行车时司机一般都开远光灯,所以每遇会车,就要变换灯光几次。本文介绍的夜间会车自动变光器,靠对方来车的灯光自动切换本车的远近光,减轻司机的劳动强度。从工作原理图可见,平时光电管2CU1无光照射, Traffic regulations in our country stipulate that when a car meets a car at night, it must use a low-beam light. When driving, drivers usually drive high-beam lights. Therefore, whenever a car encounters, it is necessary to change the light several times. This article describes the car will automatically night light, by the other to the car automatically switches the light near and far the light, reducing the driver’s labor intensity. Can be seen from the working principle diagram, usually 2CU1 phototube light exposure,