The two-day electronic and electrician internship has come to an end, but the dribs and drabs are still vivid. Especially in the process of internship, the process of mutual cooperation and serious thinking will be my unforgettable memory wealth. Although the time is very short, I only touched the identification methods of electronic components such as resistors, capacitors and diodes, as well as the basic methods and skills of assembly and welding of multimeters. I still deeply feel the charm of the subject of electronics and electrician.

On the first day of practice, we learned the layout of DC regulated power supply. Considering the limited time and resources, we work in pairs. When we saw the teacher on the projector show us how to connect the circuits on the drawings through the software downloaded to the computer, everyone's enthusiasm was mobilized. Everyone felt incredible, eager to try, and listened carefully. When we did it ourselves, although we laid out the circuit according to the circuit diagram given in the experimental instruction, we were still very excited and encountered many difficulties. Among them, I deeply feel the importance of the theory of practical connection. When we encounter practical problems, we must seriously think objectively and calmly, analyze its principles, apply what we have learned, explore step by step, and step by step, so that we can completely solve the common problems we encounter. Besides, be careful. Every wire connection, every component connection and the change of package number must be carefully checked and corrected, because a small mistake may lead to the failure of the following program. We stared at the computer screen all morning. Not only did they lose the boring feeling of attending classes in the classroom, but the students also talked and laughed. When we encounter things we don't understand, we discuss with each other or ask the teacher for help. In this pleasant atmosphere, we quickly completed the basic layout of the circuit.

Just after dinner in the afternoon, we began to check the circuit in full swing. At this time, we encountered a problem, and repeatedly modified the circuit, but after the program test, there were still components missing and the package number was lost. After a long struggle, we still consulted the teacher. The teacher pointed out our problems and gave us correct guidance. At the same time, it taught us how to find out the problem. Under the teacher's patient and meticulous explanation, our operation became smoother and many unnecessary troubles were avoided. The last step is to generate a usable circuit and check whether it can work normally according to the predetermined function, which is the most important thing in a whole day's work. Seeing that the whole day's hard work will pay off, we became a little impatient and obviously relaxed.

Next, we are in trouble. First of all, we forgot to set "no intermediate wiring layer" when we started wiring. Then when we moved the component, we didn't see clearly that we were pressing the Ctrl key, and mistakenly thought it was the Shift key, which caused rework. We are a little anxious, and our initial passion is gradually weakening. However, after that, the success of the first classmate gave us great inspiration, and both of them were particularly cautious and learned a lesson. Finally, we successfully completed the first day of internship. Although we saw that many students were taller than us when grading, stupid birds flew first, and that kind of hard work and sense of accomplishment was something we had never experienced before.

This internship, as the teacher said, is not for us to think more, but for us to do more. Many things look simple, and you can understand the circuit diagram, but you won't understand the great difference between theory and practice unless you do it yourself. What you see is simple, but there are many things to pay attention to in actual operation, and some things are different from what you think. Our experiment this time is to ask us to cross the gap between reality and theory. However, through this experiment, we also found that some things seem easy. I didn't dare to imagine that I could be independent of some timers before. However, this experiment gave me such an opportunity. Through this assembly, I have learned more about resistors, potentiometers, capacitors, inductors, the role of triodes, integrated circuit chips and other related knowledge. During the internship, I learned all kinds of common electronic components, mastered the reading method of common electronic component parameters and the method of measuring common electronic component parameters with multimeter. Learned the basic methods and skills of drawing circuit schematic diagram and printed circuit board diagram.

On the second day of the internship, I heard that I was going to learn the assembly of multimeters and the welding of circuit boards today, and that the assembled multimeters could be taken away separately after verification, so everyone came to the laboratory door of the science building early to wait. After receiving multimeter, mule iron, tin wire and pliers, under the teacher's detailed and serious explanation, we became familiar with the basic knowledge and requirements of electronic assembly and welding technology, and the intense assembly work began. At this time, we met a simple but tedious job search. We have to connect 28 resistors with different colors on the circuit board, and each resistor is marked with at least four colors, which can hurt us, but soon we all replaced complaints with practical actions and began to look for them one by one. At this time, the most critical moment has arrived. What we have to do is the welding practice of printed circuit board. Although we were exposed to electric welding during the Seiko internship last semester, several people tried it on a big iron plate at that time and there were protective measures. This time, we must carefully weld the wires properly so as not to damage the circuit board. Looking at my classmates around me, I also tried to overcome my psychological fear. I just started welding the first component with the electric soldering iron in my hand. My first welding attempt ended with my hands shaking. But maybe I really know what welding is all about. I know I have a bottom. The second time I welded a lot, my hands didn't shake much, and the more I welded, the more skilled I became. Soon the morning ended in a tense and orderly work. We arrived at the laboratory early in the afternoon and sat down to continue welding in the morning. Without the fear and tension in the morning, I started this time as soon as I picked up the soldering iron. Needless to say, it is really a good model, and there is no galvanized place. Several students had to start over because they did not pay attention to the galvanized layer during welding and damaged the circuit board. I'm glad I avoided such a mistake. Soon my circuit board was soldered, and after connecting the circuit board and the meter head according to the circuit diagram, the next step was to use the DC regulated power supply I had learned before to conduct the power-on test. I watched with tension and expectation as the teacher inserted the red and black stylus into the board and pressed the output key, but the pointer was not sensitive enough to move. I'm a little flustered, waiting for the teacher to check the problem. It turned out to be poor contact. The teacher embeds the circuit board into the multimeter again and tests the connectivity of the circuit with batteries and boards. This time, the pointer of the multimeter moved very fast, and I was lucky to finish it. When the teacher took my report, scored a single subject and wrote a big word "test" on the multimeter, my heart was finally put down. Although I am still trying to weld seriously, some students succeeded. Although mine is not the best, I am full of joy when I watch the pointer of my multimeter turn. Through this experiment, I understand the functions of common electronic components and deepen my understanding of circuit connection.

Generally speaking, this internship includes circuit design, printed circuit board and circuit welding. The purpose of this internship is to let us have a certain perceptual and rational understanding of the manufacturing process of electronic components and circuit boards; Further understand the professional knowledge of electronic information technology; Cultivate and train our practical ability, make our theoretical knowledge fully integrated with practice, and achieve high-quality talents with both professional knowledge and strong practical ability, who can analyze and solve problems, so as to prepare for smooth employment in the future.

Although the process was short, I tried my best to successfully complete this attempt. Although I am a girl, I have been interested in this kind of small production since I was a child. I didn't know how to weld at that time, but I liked to take things apart. Because I didn't understand the principle, I broke a lot of things while enjoying the fun. The current electrical and electronic practice class is to learn how to put things back. Every step I take, I am as happy as a child and have a sense of accomplishment. In addition, the characteristics of electrical and electronic practice are that students do it themselves, master certain operating skills, and design, make, assemble and debug it themselves. It organically combines basic skills training, basic technological knowledge and innovation enlightenment to cultivate our practical ability and innovative spirit. As a college student in the information age and a highly skilled person trained by the country, it is not enough to operate the mouse only. Basic hands-on ability is the foundation and necessary condition of all work and creation.

Through this study, I benefited a lot: through the guidance of the teacher, I got in touch with the just-concluded subject of electrotechnics and got a preliminary and systematic understanding of the theory of electronic technology. We learned the welding skills of common components and circuit components, the design, production and technological process of printed circuit board drawings, and the working principle and function of components. This knowledge is not only effective in the classroom, but also of great guiding significance to the study of electronic technology courses in the future, and also has practical significance in daily life. In addition, it is also a good exercise for your hands-on ability. Experience is the mother of wisdom. Throughout the ages, all inventions have been tested by practice. If the hands-on ability is not enough, you can talk about making achievements in future scientific research, especially experimental research. During the internship, I exercised my hands-on ability and improved my ability to solve problems.

What impressed me deeply was the team spirit of the students in this process, and * * * discussed * * * progress. Because I am not very clear about circuit knowledge, it can be said that it is vague. But when I don't know anything, I will ask other students for advice. Even if they are busy thinking, they will stop to help me and eliminate my blind spots. When I tell them what I think, they will seriously consider my suggestion. At the same time, I also thank the teachers for their careful guidance. From him, I learned a lot that books can't, and taught us how to better link theory with practice. These things will be of great help to my future work and life. Before the internship, I accidentally hurt my hand. The two-day internship was very short, but it added a lot of fighting spirit to my increasingly enterprising heart, which made me deeply understand that "learning without thinking is useless."