基于口袋实验室的555定时器综合实验设计

Comprehensive Experiment of 555 Timer Based on Pocket Lab

针对高校电子信息类基础实验课程教学方式单一、实践内容不足的问题,设计了基于FPGA口袋实验室的555定时器综合实验。该综合实验基于口袋实验室,设计了单稳态、多谐以及施密特触发器三合一电路,并设计基于FPGA芯片的频率计与分频计进行电路输出频率的测量。该综合实验在教学上结合“翻转课堂”这一教学模式,改变单一验证性实验为涵盖理论分析、电路设计、代码设计、动手实践与功能验证为一体的创新综合实验,能够有助于培养学生的创新思维和动手实践能力,激发学生的学习兴趣。

In order to solve the problems of single teaching method and insufficient practical content of basic experimental courses of electronic information in colleges and universities,comprehensive experiment based on FPGA pocket lab which uses a 555 timer is designed.This comprehensive experiment is based on the pocket lab,designed monostable,multi-harmonic and Schmidt trigger three-in-one circuit,and designed frequency meter and frequency divider based on FPGA chip to measure the out⁃put frequency of the circuit.The comprehensive experiment is combined with the teaching mode of'flipped classroom',changing a single validation experiments for the theoretical analysis,circuit design,code design,practical and functional verification of the comprehensive experiment innovation,which can help cultivate students'innovative thought and practical ability,stimulate stu⁃dents'interest in learning.