555定时器典型应用电路及其PCB设计

555 Timer Typical Application Circuit and its PCB Design

针对PCB教学中因忽略电路原理分析而使学生盲目进行PCB学习的问题,提出了相应的解决方法。即总结归纳了555定时器三个典型应用电路,并对其工作原理进行了分析,最后给出这些典型电路相应的PCB设计。文本所提及的教学设计能够使学生较快地掌握PCB设计方法,并对PCB学习产生浓厚的学习兴趣,可供教师作为教学参考,同时也为课程整合提供了一些思路。

the corresponding solution is proposed aimed at the problem that the analysis of circuit principle is ignored in PCB teaching ,causing that the students study PCB blindly .Three typically appli‐cation circuits of 555 timer are concluded and summarized ,and its work principle is analyzed ,and final‐ly ,the corresponding PCB design of these typical circuits is given .The teaching design mentioned in this paper enables the students to master the PCB design method rapidly and have a strong interest in learning PCB .It can provide a teaching reference for the teachers and also provide some thought for the course integration .