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前言：
本文基于南邮通达学院电子电路课程设计，据了解很多转专业、专转本的同学在面对这门课时无从下手，因此小编写下这篇文章，想能给予基础较差的同学们些帮助！
Introduction:
This article is based on the electronic circuit course design of South Post Tongda College, and it is understood that many students who change majors and transfer this book are unable to start in the face of this course, so Xiaobian wrote this article, hoping to give students with poor foundation some help!
一、课程整体要求
数字式电缆对线器的主要功能有：
（1）可在远端预设芯线编号，近端测量出对应的芯线并且以数字显示出电缆芯线编号。
（2）可以检测到电缆芯线的短路或开路故障。可由人工单线接入测试，亦可自动测试。The main functions of the digital cable alignment device are:
(1) The core wire number can be preset at the remote end, and the corresponding core wire can be measured at the near end and the cable core wire number can be digitally displayed.
(2) The short circuit or open circuit fault of the cable core can be detected. It can be tested by manual single-line access or automatically.
由于此课程设计要求做完手动即可，且在实践过程中发现，虽然项目简单，但存在很多细节接线问题，所以本文在只做手动测试，即能达到学校（通达学院实践课程基本标准，若要求自动测试，请移步本站另一大佬的文章即可：https://blog.csdn.net/qq_36785019/article/details/102869539
本文图片思路来自此大佬并根据南邮通达实际情况作出筛选修改，通达学子可直接食用。）Because this course design requires manual completion, and found in the practice process, although the project is simple, but there are many details of the wiring problems, so this article only do manual testing, that is, can meet the basic standards of the school (Tongda College practice course, if you require automatic testing, please move to the site another big man's article can be
二、系统结构要求
远端编号器用于给被测电缆处于远端的芯线编号,电缆对线器在电缆近端测出各芯线与远端的对应关系并以数字显示出近端各芯线的编号数码。
Second, system structure requirements
The remote numbering device is used to number the core wires at the far end of the cable under test. The cable alignment device measures the corresponding relationship between the core wires at the near end of the cable and the remote end, and displays the numbering number of the core wires at the near end.
四、故障判断
①短路
用7427进行判断，用发光二极管显示。
②断路
用7430进行判断，用发光二极管显示。Fourth, fault judgment
① short circuit
Judge with 7427, display with LED.
② Open
Judge with 7430, display with LED.
具体接线流程（适用于手动测试）：
准备阶段：很重要！！！！！！！！
（检查所发元器件是否正确，芯片型号是否与实验要求一致，特别检查八路开关是否能插紧）
1、拿到面包板，检测面包板是否坏损，学号是否一致正确
2、接好电源VCC、GND（接好后建议使用万用表测量是否均导通）
3、观察整体电路，做好电路元器件布局
Specific wiring process (for manual testing) :
Preparation: Very important ！！！！！！！！
(Check whether the issued components are correct, whether the chip model is consistent with the experimental requirements, and especially check whether the eight-way switch can be plugged tightly)
1, get the bread board, check whether the bread board is damaged, whether the student number is consistent and correct
Connect the power supply VCC and GND (After connecting it, it is recommended to use a multimeter to measure whether it is all connected)
Observe the overall circuit and do a good job in the layout of circuit components
主体电路图：
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详情见完整版：完整版数字式电缆对线器
按照主体电路图，先接好主体电路部分，最好按模块接线，接一段测一段，方便电路的检测。特别注意切勿带电操作，通电后，若发现芯片发热严重，请及时断电并检查线路是否连接错误、输出电压是否符合要求。
According to the main circuit diagram, first connect the main circuit part, it is best to connect according to the module connection, and test a section to facilitate the detection of the circuit. Pay special attention to do not live operation, after power, if you find that the chip heat is serious, please power off in time and check whether the line is connected incorrectly and the output voltage meets the requirements.
到此，只剩555电路和报警电路了，你通过接入信号发生器调试（500khz，0-5v），已经可以显示正确数值并通过八路开关可控制数码管显示对应数字了。
若你不能完成上述要求，请检查：
你的接线是否接对、电阻是否使用正确、引脚是否插到位。
555电路及报警电路见附录。
At this point, only 555 circuit and alarm circuit, you through the access signal generator debugging (500khz, 0-5v), has been able to display the correct value and through the eight-way switch can control the digital display of the corresponding number.
If you cannot complete the above requirements, please check:
Whether your wires are connected correctly, whether the resistance is used correctly, and whether the pins are inserted in place.
555 circuit and alarm circuit see appendix.
注意：555时钟电路用于代替信号发生器，接好后则不用使用信号发生器了。555上的输出OUT接到ADC0809的10号引脚clock处。
Note: The 555 clock circuit is used to replace the signal generator, and once connected, the signal generator is not used. The output OUT on 555 is connected to pin 10 clock of the ADC0809.
附件涵盖555电路图、报警电路图、整体电路图，先接好各个电路自身，再按照整体电路图将555电路和报警电路接入到主体电路图中，仔细检查各个端口连线，避免出现插错孔、剥线过段引起的接触不良、不导通的情况。确认线路无误后，通电即可。
The attachments include 555 circuit diagram, alarm circuit diagram, and overall circuit diagram. First connect each circuit itself, and then connect 555 circuit and alarm circuit to the main circuit diagram according to the overall circuit diagram. Carefully check the connection of each port to avoid poor contact and non-conduction caused by inserting wrong holes and stripping lines. After confirming that the line is correct, power on.
附件：
555电路
555 circuit
实物完成图（手动测试）
Physical finished drawing (manual test)
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完整版见：完整版数字式电缆对线器
整体电路图
Overall circuit diagram
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完整版见：完整版数字式电缆对线器
希望能给予你一些帮助！加油！
Hope to give you some help! refuel！
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