Don't ignore the modular design, efficiency is critical!

1

Don't forget to add capacitive filtering on both the input and output of the power supply.

Normally, the electrical signals at the input and output of the power supply are unstable, and the power is directly supplied to the load, which will cause damage to the load for a long time, and it will also make the operation unstable. And we know that the capacitor has a function of energy storage filtering on the voltage. The electron load is stored in the capacitor, and the electron charge is continuously accumulated in the capacitor, and then the output is smoothly outputted - the smooth output and no fluctuation, so that the load can obtain a smooth and continuous input. A smooth, no-fluctuating voltage that makes the load work more reliable and does not damage the device. The capacitor is used to filter the voltage supplied by the load. From an empirical point of view, the general electrolytic capacitor is matched with a 104pf chip capacitor for filtering. Large capacitors are used to filter low-frequency waves, and small capacitors are used to filter high-frequency waves. The combination of the two is most effective.

2

Don't let the useless power be too big

In the circuit design, we should try to increase the power factor by making the useless power as small as possible. If the heat on the board occupies a large part of the circuit design, the power output from the board will decrease. Assuming that the power consumption of a board is large, when the power output from the board is not changed, this requires a large input power of the board, which is more power-consuming.

3

Do not choose the power of the components at will.

Each electronic component has different power, the power selection is large, the price of electronic components is high, and the cost is increased. If the power selection is small, the electronic components will be heated, and the long-term work in high temperature will reduce the service life. . Reasonable selection of the power of the electronic components, by calculating the power consumption of the components in the circuit to choose. When the rated power of a component is known, it is better to design the circuit not to exceed its rated power. Otherwise, we need to add a heat sink to it. When the current flowing through the component is relatively large, we must ensure that the pressure difference between the two sides is not too large. That is, if we select the current value flowing through it, then the pressure difference across it will have a maximum critical value.

4

Don't ignore the basic characteristics of components

As an electronic engineer, if you want to design a better circuit, you must be able to flexibly use the basic characteristics of electronic components, match and combine the existing working principle and characteristics of the components we have learned, and then form Different functional circuits to implement a development of the project. The diode's single-conductivity, reverse withstand voltage, clamping characteristics and other important characteristics; the reverse voltage regulation characteristics of the Zener tube; the flow control flow pattern of the triode and so on.

5

Don't forget the common electronic component package

The packaging of electronic components is actually the shape of the components, including the size of the components. In the process of circuit design, you must be familiar with the packaging of components. When talking about a package, you can know what it is in the brain, think of it and form a concept. First, in production, the difference in packaging involves the production of welding technology. Second, when designing the PCB layout, the package determines the appearance of the board. Familiar with common packaging, component selection is more effective.

6

Don't ignore modular design

The hardware design is the same as the software writing program. When the software writes the program, we use it as a function module for each function. In different projects, the same function module is sometimes used. For example, lighting, communication, we have written it as a fixed function module. When we need to use it in different projects, copy it directly and use it directly. This greatly reduces the time we write the program and improves our efficiency. We call it modular management. Therefore, for our hardware engineers, or senior engineers, we also need to carry out modular design when designing the circuit, which greatly reduces the time we design the module, improves our design efficiency, and makes us design simple. There is no need to repeat such a thing in a project.

7

Don't ignore the cost

As an electronic engineer, you must pay special attention to the cost of the product. The cost is the red line from the beginning to the end of the project. A project, for a company, he will eventually sell in the market, for profit, if the project you made is too expensive, then even if you do it well, no one If the company can't sell it, the project will eventually fail. For a good engineer, cost is a measure of how good or bad it is.

8

Don't position yourself very low

To improve your self-motivation, you can't be happy with a product. Excessive excitement can blind people. Always ask yourself what my competitive advantage is compared with other engineers' products.

9

Don't just copy another circuit from someone else

The design of the schematic, in which each component is carefully selected and calculated, is scientifically based. For an electronic engineer, if you just copy someone else's circuit, you can never grow. Because we don't know where the advantages of the copied circuit are, what are the disadvantages. Don't just copy other people's circuits, you must design such a circuit according to your own knowledge. Even if you see someone else's circuit, you have to be able to analyze and understand other people's circuits, find out the problems in the circuit, and then turn into your own circuit, which is what designers need to do.

10

Don't pay attention to the training of engineers,

The main habit of engineers is to cultivate the depth and breadth of thinking and the rigor of design. Human thinking, or we call it ability, the level of thinking is expressed in the level of ability. The difference between people is not in IQ, but in thinking. The breadth of thinking determines how far a person can go in a certain field in the future. Therefore, the cultivation of thinking is particularly important, especially in cultivating self-denial, breaking up the self, and pulling back the scattered thoughts is particularly important. Then the design circuit must be rigorous. Every step, every logical deduction must be impeccable, without missing, and can stand the audit. Every time we complete the circuit design of a module, every step, every step, we must review it, whether the derivation function can be realized, what happens when an accident occurs, how to make up, etc. . Develop a better habit to make the circuit of design more impeccable.

11

Don't think about design from a single angle, you need to coordinate design globally.

In the design, you can't drag the components together and draw them directly, and you can't change them. This design lacks systemicity and coherence. So when we design a thing, we need to have a global view, and then design the details. At the time of design, we need to have theoretical things as a guide.