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光耦合器件的原理演示,常是教师教学中的一个难点,笔者根据演示的直观性、可操作性,改用音频信号做光耦器件的光电信号转换传输实验,效果直观、学生便于理解,易掌握光耦器件原理,加深印象.电路组成:此实验电路由NE555和红外发光二极管组成的音频发射电路和以CD4069构成的音频信
Demonstration of the principle of optical coupling device is often a difficult point in the teaching of teachers. According to the intuitiveness and operability of the demonstration, the author changed the use of audio signals to perform optoelectronic signal conversion and transmission experiments for optocoupler devices. The effect is intuitive and students can understand easily. Master the principle of optocoupler devices and deepen the impression. Circuit composition: This experimental circuit consists of an audio emission circuit composed of NE555 and infrared light emitting diodes and an audio signal composed of CD4069.