Electronic internship diary

If I were to use a word to describe this internship, it should be - easy, if I were allowed to add another word, it should be - smooth.

From March 5th to March 18th, 2019, for a full two weeks, our task was only a two-hour lecture, six three-hour lab sessions, and each person designed a timer and叮咚门铃. Like a broken kite, it’s a bit free.

On March 6th, the first time I entered the lab, I went to the computer room to inquire about the information related to the experiment. Sadly, the speed of the Internet is slower than the improvement of the living standards of the Chinese people. In the end, I can only read the experimental report instructions copied over the computer.

On March 7, the second time into the laboratory. I received a set of tools from the squad leader - pliers, tweezers, clips, screwdrivers, and a set of soldering irons I have never seen before. I received an abandoned circuit board, and the partner xx carefully explained the use of the soldering iron and various precautions. I was surprised to know that. It turns out that xx has been working on this kind of welding circuit in a communication company for the past two summers. Compared with him, I suddenly feel that I have failed. The part-time job I have done in the summer is not a bit of technical content, and my professionalism is even more difficult. It is no wonder that boys generally have an advantage over girls when looking for a job.

On March 8, the third time into the laboratory. Received a variety of devices and boards for timers and doorbells. The task of this test is to test the polarity and size of various devices. I have to say that as a student, "good question" is indeed a good quality, which makes everything seem so smooth. It is also so simple for me to simplify the circuit diagram from the experimental guide.

On March 12, the fourth time into the laboratory. Is my simplified circuit diagram too clear at a glance? Oh, from the assembly of the device to the final soldering of the soldering device, everything seems so tacit and smooth. For the work of the wire joint to the rubber, I was amazed at the sharpness of my nails, and I was glad that I did not cut my nails the night before. With two exclamations, both my timer and xx have reached the requirement that the switch control light is on and then the light is automatically turned off. It seems that we are the first team to complete the timer, happy to sing the long-forgotten "Love Transfer".

On March 13, the fifth time into the laboratory. I tried my timer and everything was fine; but the xx switch didn't work. I can't understand it, I went to the other group and turned around. After returning, xx is testing my timer again, and my light-emitting diode is not lit. Can't find the reason, trouble! I forgot how I found out that it might be the cause of the burnout of the integrated circuit. So I borrowed the integrated circuit of xx, and the result was burned again. It was discovered that the positive and negative poles of the power supply were reversed. Then borrow the integrated circuit of xx, and finally repeat the same mistakes, and I was burned out. On that day, the positive and negative poles, the positive and negative poles reminded me deeply. However, when I checked the integrated circuit of Zhixun again, the timers of xx and I were not invalid or the diodes would not go out by themselves. There is no way to control the contact with the power supply by hand, resulting in the illusion that the switch is effective and the diode will automatically go out. Hehe, during the acceptance process, I was able to work seamlessly with xx, and both got good results. After that, the device on the circuit board was removed. According to the circuit diagram of the jingle bell that I designed in advance, I and xx started the process of assembling the device, soldering the device, and soldering the circuit. This time, I have a lot of proficiency, and I have made full use of the resistance wire that the device itself has. The soldered circuit is simpler and more beautiful than the timer. I forgot how many "perfect" I uttered in the process. After the successful test of the integrated circuit of Zhixun, the work is completed!

On March 14, the sixth time into the laboratory. First of all, I tried the doorbell of xx with the integrated circuit of xx. The tragic scene happened again. The positive and negative poles, the positive and negative poles, the positive and negative poles... fell three times in a row at the same point. I really want to find a seam to drill in. . By borrowing the integrated circuits of xx, he is afraid of me and does not borrow. Fortunately, xx and his dormitory, half borrowed and grabbed. Finally passed the acceptance smoothly, xx will be withdrawn first. Next, I helped xx weld the unfinished project. After three inspections and revisions, I finally "snapped". That voice is the most standard sound I have heard.

Finally, let me talk about a group of partners xx and xx next to me. During the three days of the second week, the two of them had not been easy, and they had to think about the operation in class. But in the end it was perfect and it got good results. Xx is still so serious and persistent; and xx, our squad leader who doesn't like to learn, let me see the other side: Is this the most representative boy? Do not love to learn, but love to do it.