晶体三极管在电子电路中的应用极为广泛。而光电三极管是晶体三极管的特殊类型,与普通三极管不同的是,光电三极管只有两个极。在实践中可以利用那些基极引脚齐根折断而报废的晶体三极管,将其改造为光电三极管使用。本文首先阐述光电三极管的工作原理和检测方法,然后分析了其在光控电路中的变通应用,具有一定的参考价值。 Transistor applications in electronic circuits is extremely wide. The phototransistor is a special type of transistor, and ordinary transistor is different, the phototransistor has only two poles. In practice, you can use those base pin Qigen broken and scrapped the transistor, to transform it into a phototransistor. This paper first describes the working principle of the phototransistor and detection methods, and then analyzes the light control circuit in the flexible application, has some reference value.