How to start circuit design, how to design circuits

You must first learn to draw a picture, and then be able to make a real thing according to the picture.

It's not that your supervisor can make things without drawings, but the principle of the electrical cabinet is relatively simple, he can draw the picture in his heart, and then make it according to the real thing, and practice makes perfect, and if you do it, you will find that all the principles of the electrical cabinet are similar.

I don't know how you do it when you've been an electrician for a few years. Maybe it's just to understand. Even half-understood. It's like the person in charge on the construction site.

After all, design and execution are two very different grades.

Every time you get a circuit diagram, you have to look at it carefully. It's not that you have to hold a magnifying glass and look hard. You have to analyze how the entire circuit works.

What is the process of the signal? Why is it designed this way? When you look at the circuit diagram and have doubts, it means that you are going to improve.

All progress is the process: thinking – finding problems (questions you don't understand or have questions about) – solving problems.

If you can't even find the problem, how can you make progress?

In addition, designing circuits requires experience. Engineering requires years of experience. There is a good saying: when a master makes a move, each move has a corresponding theoretical support, and a veteran makes a move, and every move has a corresponding experience support.

If you don't think about anything every time you get a drawing, then you don't want to design for the rest of your life.

Electric Drag is a good book to know when you look at it.

Experience is the most important thing, and if you see too much, you will naturally pull.

Steps to carry out circuit design:

1. To master the basic theory of electronic circuits, the most basic books should be read, such as: "Analog Electronic Circuits" and "Digital Electronic Circuits".

2. Then it is to accumulate more basic circuits, and then designing a large-scale circuit system will be like building blocks, which is very simple.

This article can give you inspiration and inspiration.

3. Start using an EDA software, such as AltiumDesigner, and follow the mature circuit to do it all over again, from the schematic diagram to the big potato stupid PCB, and finally make the real thing.

1. The first step: to understand the basic working principle of commonly used electronic components and its function, the premise of circuit design is to be familiar with commonly used electronic components;

2. Step 2: Start from the circuit diagram and read more schematic diagrams of electrical appliances, such as: fluorescent lamps, old-style washing machines, refrigerators, etc.;

3. Step 3: Raise questions, establish design goals, and use block diagrams to synthesize functions and signal flows;

4. Step 4: Carry out simple design, and finally integrate and debug according to the block diagram of all parties.

If the master is to use the 74LS283 chip and the 74LS86 chip to control the high and low levels as the binary 0 and 1 through the DIP switch, use the ordinary LED light to show the high and low level state, the high level is on, the low level is off, and the conversion of the adder and subtractor is realized through the 2-digit DIP switch, after passing through the two sets of chips, the current passes through the LED, and the LED light is on, which is represented as 1, and if the light is off, it is indicated as 0.

In addition, a power supply circuit is designed, the AC voltage of 9V is reduced to 5V, and then input to the adder and subtractor circuit, which can realize the addition or subtraction of 8-bit binary, and the result range should be between 00000000 and 111111110, and the maximum number of eight-digit binary numbers converted to three-digit decimal numbers is 255.

Designing a circuit diagram is generally divided into three steps from a broad perspective:

The first step is to learn to look at other people's circuits;

The second step is to learn to modify other people's circuits according to your own needs;

The third step is to design the circuit independently.

The specific method is as follows: In fact, any complex circuit is composed of small circuit modules.

First of all, first understand a small unit circuit, and this unit circuit is composed of components, so we first get through the components in this unit circuit, and master these components are nothing more than current, voltage, power, working conditions and other parameters;

These devices are then placed in a single unit circuit, and their role in the circuit is analyzed according to the parameters mentioned above. Then be sure to do more, it is recommended to change the parameters of each component to test, and only one component can be replaced at a time, what is the change in the circuit, think about why there is such a change, and then gradually replace all the components, repeat the above, so that you will have a deep understanding of these components in the circuit, and what you have done will not be forgotten.

Secondly, the two unit circuits are jointly debugged, and the problems in the debugging process are observed until they are turned on. Finally, the multiple unit circuits are jointly debugged until they are turned on. In this way, from simple to complex, step by step to learn and master the circuit design experience, and these experiences will be stored in the brain as a database, and what circuits are needed in the future when designing circuits, the brain will immediately jump out of the circuits that have been made, so that the circuit design is particularly easy and easy.

It depends on what aspect of the circuit diagram you design, and what is the specific use of the shot.

The first step is to be clear about the function or goal that you need to achieve in the solution you are designing.

The second step is to understand the process requirements and constraints of the scheme you are designing;

These two steps must be confirmed repeatedly, ask more, discuss more, the more detailed and comprehensive the better, and do not omit any details. Then compile these contents into a design task book, as the design basis for the record (it is best to have the relevant parties to sign and confirm) for easy inquiry. Sometimes you don't need to write the design task book yourself, the customer or leader will write it for you, and you can just do it;

The third step is to draw a block diagram of the scheme, and the method will not be detailed. The block diagram should be drawn in detail, and it is better to draw more that may not be useful, rather than omit what may be useful;

The fourth step is to determine the plan, list the two options for the plan, and choose one first;

The fifth step is to select the core components and the main components, sometimes you must do some simple calculations, list the components and the calculated values, especially the interface parameters, and make sure that there is no problem with the interface between the components;

Sixth, if the scheme has a cost requirement, repeat the fifth step for another scheme. Then do a ** comparison. Of course, the main consideration is cost-effective;

The seventh step is to report the plan for approval;

The eighth step is to draw the circuit schematic diagram, component component layout diagram, wiring diagram, shell or cabinet diagram, and list the material list.

Hope it helps!

In two steps:

1. Master the basic theory of electronic circuits, and read the most basic books, such as "Analog Electronic Circuits" and "Digital Electronic Circuits".

2. Then it is to see more and accumulate some basic circuits, the basic circuits are easy to understand, and after reading more, designing the circuit scheme is like building blocks, which is very simple.