I think an electronic technician should have the following abilities:
1, Analog/Digital Circuit Analysis and Design. Everything in the textbook is good, including signal amplification, filtering, waveform generation, regulated power supply, logic simplification, basic flip-flop, basic counter, register, pulse generation and shaping, ADC, DAC, phase-locked loop and so on. We should be able to analyze and design the function and performance of the circuit qualitatively and quantitatively, such as stability and frequency characteristics. These things generally need to accumulate over time to be well informed, and then practice makes perfect.
2. Computer principle and structure. At present, there are basically no electronic devices that do not use computers, so it is necessary to know computers, and it is best to be familiar with computers. Understand how the computer works, how the software works in the computer (it is best to write the program yourself), be familiar with the peripheral circuits and interfaces of common computer systems, and understand how the CPU and peripheral circuits work in harmony, etc. It is best to be familiar with MCS-5 1. Writing programs is not a problem. What matters is the idea, but you must do it.
3. PCB. The basic requirement is a four-layer board. We should understand the influence of PCB on EMI and ESD and find ways to avoid it. It takes time to train PCB beautifully and without problems.
4, VHDL language. This needs to master the basic skills abroad, and it is also popular in China. Mainly used for developing FPGA/CPLD devices and logic simulation, VHDL is often used as the input of ic design. For the time being, if you are not too demanding of yourself, you don't have to master it.
If time and energy permit, you can learn operating system, data structure and so on. Of course, you must master the C(C++) language first, so that you can work in the (software/hardware) system in the future. But the foundation of analog/digital electricity must be good, which is the basis of learning other things. At the beginning, we usually start with the analysis of the circuit to understand how the current flows in a circuit, how the voltage is generated, how the inductance and capacitance are discharged, and so on. From simple to complex, get into the habit slowly, and many things will be understood naturally.
2. Electronic product sales knowledge
Sell the industry
Read more books on sales, and then practice.
I used to be in the building materials business, and when you want to sell something,
Need to know all aspects of the characteristics and uses of that thing. ...
Although the mentality has become better, but the mentality is not good, how can you let customers buy your goods?
When a customer enters your facade, he will think about what he wants to buy.
So, first of all, give customers a good image when they enter the store, whether it is the store owner or the salesperson.
Second, look at people. If you are an expert, you should be honest, or you will lose a sum of money. If the object is a random person, don't kill him, because he is likely to be your loyal customer in the future, so if you come for the first time, give him a discount more or less, so that he will have a good image of your store. Even if something goes wrong with what you buy him in the future, he won't care, because he will always only know that you were nice to him for the first time, and this exception was completely unintentional.
Electronic goods are always profiteering goods.
Whoever is red, famous and honest is the last player.
Sorry, I don't remember any more.
You must continue to tell your friends when you have time.
3. Introduce an electronic product composition of about 500 words, and explain it in more than two ways.
Introduce a computer
Computers are well-known electronic products, but not everyone knows computers. Next, I will introduce computers to you.
Generally speaking, the computer is divided into two parts, one is the hardware system and the other is the software system.
The hardware system is something that can be seen and touched. They are monitor, keyboard, mouse, speaker, camera, host and so on. There are power switch, reset key, hard disk indicator light and power indicator light on the host. The power switch is the biggest button on the host computer, and its function is to turn on and off the computer; The reset button usually restarts when the computer crashes; The small green light of the power indicator will always be on after the computer is turned on; When reading and writing data on the hard disk, the hard disk indicator will light up, indicating the working state of the hard disk.
The software system is invisible and intangible. It controls all kinds of information in the computer, just like all kinds of knowledge in our brain.
Software and hardware are inseparable parts. Without them, the whole computer is useless. Therefore, software is very important to computers and must be indispensable. No matter how good the computer is, if it doesn't have software installed, it is a pile of garbage.
Computers are widely used. It is like a teacher who knows a lot of knowledge. When we encounter a question that we don't understand, we can "ask" it online. He is both a teacher and a friend. When we are bored, we can play games and listen to music online.
Students, after listening to my introduction, do you know much about computers?
4. What is the common sense of storing electronic components?
Dry ventilation
Temperature and humidity recorder for low humidity storage of electronic products
Abstract: Humidity is the deadly enemy of electronic product quality. It is an important task for high-tech electronic enterprises to manage the environmental humidity of electronic products with modern and effective methods and reduce the losses of enterprises, which can be completed by automatic temperature and humidity recorder.
Content:
First, the harm of humidity to electronic components and the whole machine
Most electronic products need to be operated and stored under dry conditions. According to statistics, more than 1/4 industrial manufacturing defects are related to the harm of humidity every year in the world. For the electronics industry, the harm of humidity has become one of the main factors affecting product quality.
(1) The finished electronic machine will also be harmed by moisture during storage. Too long storage time in high humidity environment will lead to failure, and the CPU of computer board will oxidize gold fingers and lead to poor contact.
The humidity of the production and storage environment of electronic industrial products should be below 40%. Some varieties also need lower humidity.
(2) Integrated circuit: The harm of moisture to the semiconductor industry is mainly manifested in: moisture can penetrate the ic plastic package and invade the IC from the gaps such as pins, causing the IC to absorb moisture.
SMT forms water vapor during heating, which leads to cracking of IC resin package and oxidation of metal inside IC devices, leading to product failure. In addition, in the process of PCB welding, the release of water vapor pressure will also lead to virtual welding.
According to IPC-M 190 J-STD-033 standard, SMD components exposed to high humidity air environment must be placed in a drying oven with humidity lower than 10%RH, and the exposure time is 10 times, so as to restore the "workshop life" of components, avoid scrapping and ensure safety.
(3) Liquid crystal devices: Although the glass substrates, polarizers and filters of liquid crystal devices such as liquid crystal displays need to be cleaned and dried in the production process, they will still be affected by moisture after cooling, which will reduce the qualified rate of products. Therefore, after cleaning and drying, it should be stored in a dry environment with relative humidity below 40%.
(4) Other electronic devices: capacitors, ceramic devices, connectors, switching devices, solder, PCB, crystals, silicon wafers, synchronous oscillators, SMT adhesives, electrode material adhesives, electronic pastes, high-brightness devices, etc. , will be hurt by moisture.
(5) Electronic equipment in operation: between the semi-finished product in packaging and the next process; Power on PCB before and after packaging; IC, BGA, PCB and so on. Unpacked but not used up; Devices waiting to be welded in the tin furnace; Equipment that needs preheating after baking; Unpackaged finished products, etc. , will be hurt by moisture.