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1引言光敏电阻的阻值随光照强度增大而减小,可以起到光电开关的作用[1].利用光敏电阻的这一特性可以设计出很多种自动照明设备[2],还可以用于制作各种太阳自动跟踪仪器[3].为了在教学中让学生了解到这些应用,并启发学生设计一些简单的应用电路,我们设计了两种光敏器件,包括光控
1 Introduction The resistance of photosensitive resistors decreases with increasing light intensity and can act as a photoelectric switch [1]. This type of photoresistor can be used to design a wide variety of automatic lighting devices [2]. It can also be used Making a variety of automatic sun tracking instruments [3]. In order to teach students to understand these applications in teaching and inspire students to design some simple application circuits, we designed two kinds of photosensitive devices, including optical control