1. To welcome the New Year's day in 2020, to design a digital display circuit, control digital tube display 2020 words, require a display effect of: digital display four seconds, put out a second, every 5 seconds for a cycle,
2. Suggest to msi counter 74 lvc161, 74 hc4511 etc as the raw material, adopting different methods (such as asynchronous reset, sync 0, sync value, etc.) to complete the design of display circuit, also can choose other creative teaching content in raw materials involved in design;
3. The design of circuit simulation, and the function verification and functional verification of important working point in the process of screenshots show, used for auxiliary in the report shows that the simulation results,