(A) requires: The PROTEUS draw schematic and PCB plans and complete the following tasks: ⑴ with four LED digital tube display and sub output. ⑵ can set the alarm button, and stop trouble without manually. ⑶ by pressing a button when setting campus. (4) write a detailed design report. (5) gives the circuit schematic, PCB diagrams and source code. (B) of the outstanding requirements: According to the PCB Mapping PCB, and soldering device debugging

数字钟电路的分析与设计.doc

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