How to master the knowledge of electronic circuits through self study

The study of electronic circuits is a very long process, which requires a lot of accumulation, and many friends have studied for many years and have not really started.

First of all: grasp the characteristics of capacitance, resistance, inductance and its role in the circuit, such as the voltage of the capacitor can not be abrupt; The principle that the current of an inductor cannot be realized. Because this is an analog circuit.

For basic components, only if you are familiar with the basic role of these components and master the conventional judgment methods, can you understand the schematic diagram.

01. Resistance function: The main function of standard resistance is to generate heat.

When connected in parallel with other components, the resistor can be shunted. When connected in series with other components, the resistor can be divided.

02. Capacitive function: 1. Filtering, 2. Bypass, 3. Decoupling, 4. Energy storage, 5. Coupling.

6. Resonance. 7. The time constant is used as a delay for Huijing.

Second, get the diode.

The working principle of the regulator tube (unidirectional conduction and Zener characteristics); Transistor.

The principle of amplification, familiar with the three circuits of the three round blue socks tube: the principle of amplification circuit, switching circuit, and oscillation circuit (the principle and characteristics of positive feedback and negative feedback in the circuit);

Diode function: The application of diodes in circuits is indispensable, whether it is to do rectifier circuits.

It will be used for clamping or some other role.

The function of the three-orange exciter: the triode has three working states: cut-off state, amplification state, and saturation state. When the transistor is used for different purposes, its working state is different.

Finally: use the above knowledge to specialize in the construction of discrete components of the circuit, and fold, first simple and then complex. Look at why other people's circuits are designed the way they do, and the role of each component in the circuit.

Then, take more notes, start to accumulate hardware circuit knowledge, and slowly, understand more, and you will get started little by little.

Self-taught electronic circuits have the following:

1. Overcome the fear of difficulties. Beginners can often be daunted when they first see a complex circuit diagram for a complete machine (such as a TV). In fact, no matter how complex the circuit of the whole machine is, it is also composed of various unit circuits with different functions, as long as the circuit of each unit is clear.

The problem is solved.

Second, to learn the basic knowledge to understand the whole mechanical and electrical rules to talk about the circuit of each functional unit in the road, it is necessary to learn the courses of "electrical circuit" and "analog electronic circuit". You can first take the textbooks of "Electrical Circuits" and "Analog Electronic Circuits" as the basic learning content, and then according to the work you are engaged in, you may further learn the basic knowledge of other electronic circuits (digital, high-frequency, pulse), as well as the composition, working principle and use of computers.

3. Pay attention to the necessary experiments and production in the practical link to deepen the understanding and consolidate the knowledge that has been learned.

Fourth, according to their current work, selectively carry out the study of professional knowledge, so as to continuously enrich and improve. Electronic technology books, electronic newspapers and periodicals, TV lectures, etc. are all good mentors and helpful friends.

To learn electronic circuits well, you must first know the difference between electronic circuits and electrical circuits. An electrical circuit is a circuit that is made up. In addition to resistors (R), capacitors (C), and coils (L), electronic circuits also include semiconductor components such as diodes and transistors (transistors).

Knowing this, you can start learning about electronic circuits.

Electronic circuits are broadly divided into 8 types:

1. Amplification circuit.

2. Oscillation circuit.

3. Modulation circuits.

4. Detection circuit.

5 filters. 6 operational amplifiers.

7. Logic circuits.

8. Power supply circuit.

If you can learn how to make a simple medium-wave 1-3 tube radio, you will be able to master the basics of electronic circuits.

Resistors, capacitors, inductors and other electrical components, transformers, manifolds, and three sets of tubes, which are not soldered on the circuit board, can be measured whether they are good or bad.

Pay attention to mastering system knowledge, and learn according to a certain plan and a certain plan. There is still a lot of knowledge involved in electronic circuits, and each stage is connected, just like the arrangement in a textbook.

To learn electronic circuits, it is recommended to explore, and the progress of derivation, I think the experiment is very important, for example: to make a simple electric mosquito, we need diodes, capacitors, power supplies, resistors, etc., how to make them into electric mosquitoes, but also need us to carefully refer to, understand, and learn the performance, specifications, models, and ,,, of various components.

I feel that this kind of learning is interesting, solid and useful

Learning electronics is not a year or two can be proficient, to be psychologically prepared, when learning, circuit analysis, digital electricity, modular electricity is the foundation, the most basic of which is to understand, lay the foundation. When you have time, you can work as an apprentice in a repair shop and learn a lot of practical knowledge. When designing a circuit, you must first understand the most basic knowledge, analyze what kind of unit circuit to use according to the purpose of the circuit to achieve, and then calculate the relevant parameters according to what you have learned, such as some relevant formulas in the mold, but you still have to learn the basic courses such as circuit analysis, digital electricity, and model electricity.

Takeaway: Think more, research more, experiment more, ask why?

Interested in enrolling in classes.

Operations on the job.

For amateurs, learning electronics is actually starting with discrete components of AM radios for a number of reasons

1. Complete circuit types:

Don't underestimate an old AM radio, where there are radio wave reception, variable tuning, high-frequency oscillation, superheterodyne frequency conversion, intermediate frequency selection and amplification, transformer coupling, capacitive coupling, diode detection, class A amplifier, push-pull amplifier, class A and B amplifier and other electronic circuits, in these circuits there are also filtering, positive feedback, negative feedback, AC bypass and other details. It is the culmination of analog electronic technology! It is also a collection of radio reception, frequency modulation, amplitude modulation, carrier, modulation, demodulation, tuning, oscillation, differential frequency, Class A high amplification, low amplification, push-pull, OTL, OCL power amplifier knowledge.

2. Through the debugging of the bias current at all levels, you will deepen your understanding of Class A amplifiers, Class A and B amplifiers and push-pull amplifiers. Through debugging, you can also know why the amplifier goes into saturation, why there is clipping distortion, crossover distortion, and so on. Especially after debugging the quiescent current and midpoint voltage of OTL and OCL, you will realize how closely involved they are.

Of course, you will also appreciate how important it is to select the pair in these circuits.

Through mid-week, unified modulation, etc., you will deepen your understanding of LC resonance, frequency conversion, and frequency selection circuits.

3. AM radio kit is cheap (beginners don't pay attention to FM first, get AM and then play FM), **rich. A book about the radio, a multimeter, a soldering iron, and a kit for about ten yuan can be used, and it will not be painful to come back if it is not successful.

If you can weld and tune the six-tube radio kit for a set of ten yuan or so, your circuit foundation will also be available, the circuit schematic diagram will also be read, and the printed circuit board will also be read.

If you are familiar with analog circuits, digital circuits are no problem!

First of all, I started with the basics of circuits, and then learned analog electronic technology, digital electronic technology, and microcontrollers. Watch some courseware or tutorials on the Internet, and try to make some small productions by yourself.

I often read mold electricity and books about this kind, discuss more on the Internet, and practice more.

There is no shortcut to learning, only to find the right way to avoid detours, interest and hobbies are the key, for what you don't like, it is difficult to learn well, for electronic circuit learning, my suggestions are as follows:

1.Starting from the basics, to learn the basics, we must first know what electricity is, as well as the relevant parameters of electricity, such as voltage, current, power, AC, DC, etc., and then learn to understand electronic components, understand common use (pay attention to common use), I used to read "How to read radio circuit diagram".

2.It is meaningless to memorize by rote, to do more, apply flexibly, combine what you have learned, combine theory with practice, use it, start from simple things, use a universal board or draw circuits by yourself, make some simple circuits, verify the theories you have learned, and make some practical small products is better.

3.In the process of learning, pay attention to the development of technology at any time and understand new technologies.

There is a lot of information on the Internet, combined with books to learn, and then practice.