Improving the efficiency of PCB design
Author:Huang Chunyang Time:2021-06-08 08:05 Browse(696)
Improve the efficient design of PCB, touch screen and OLED Forum
Designing circuit for an electronic engineer is a necessary hard work, but no matter how perfect the principle design is, if the circuit board design is unreasonable, the performance will be greatly reduced, and even can't work normally in serious cases.

Improving the efficiency of PCB design

based on my experience.
I summarize the following points that should be paid attention to in PCB design, hoping to give you some enlightenment.
this article is a summary of my experience( s$ A) E7 c3 F2 m    l$ P       No matter what software is used.
there is a general program for PCB design, which will save time and effort according to the order. Therefore, I will introduce it according to the production process.
(because Protel interface style is close to windows, and its operation habit is also similar, and it has powerful simulation function, and more people use it, so I will explain it with this software.
)* Y.
? 9 J5 U5 Y3 r7 t" t$ q4 n; i! A        Schematic design is the preparatory work, often see beginners to save trouble directly to draw PCB board, this will not be worth the loss, for simple board, if skilled process, might as well skip.
but for beginners must follow the process.
on the one hand, this can form a good habit, On the other hand, only in this way can errors be avoided for complex circuits.
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E1 B + R" E, Q: U|       When drawing the schematic diagram, the hierarchical design should pay attention to the final connection of each file as a whole, which is also of great significance for future work.
due to the differences in software, some software may appear to be connected but not connected (in terms of electrical performance).
if you do not use the relevant detection tools to detect.
in case of a problem, it will be too late to find it when the board is ready.
in case of a problem, it will be too late to find outTherefore, we have repeatedly stressed the importance of doing things in order.
we hope to attract your attention.
we hope that we can do things in order#The schematic diagram of T $~ - C7 M7 @) H. Q2 q is based on the design project.
as long as the electrical connection is correct, there is nothing to say.
next, we will focus on the specific problems in the plate making process.
in this paper, we will discuss the specific problems in the plate making process4 l" ]! x' E    C: M & G.
F19 e + p $[- D "a # {0 ~ the closed physical border is a basic platform for the later component layout and routing, and also plays a constraint role in the automatic layout, The components coming from the schematic diagram will be at a loss.
but we must pay attention to the accuracy here.
otherwise, the installation problems will be more troublesome in the future.
besides, it is better to use circular arcs at the corners.
on the one hand, it can avoid sharp corners scratching workers, At the same time, it can also reduce the stress.
in the past, one of my products was always in the process of transportation, and there was a case of PCB board fracture on the surface of individual machine.
it would be better to use the arc.
in the past, one of my products was always in the process of transportation" T* i6 _ 0 S8 B9 D.
K1 W2, the introduction of components and networks 3 Q * U "J; h7 x) Q4 E1 iIt should be very simple to draw a good frame of components and networks, but there are often problems here, so we must carefully solve them one by one according to the errors prompted, otherwise it will take more effort later.
generally speaking, the problems here are as follows: the packaging form of components can not be found.
there are problems with component networks, unused components or pins, The comparison shows that these problems can be solved quickly.
conclusion   R* C# A( r! S $k% w & M "G8 L3, layout of components% i.
?' The layout and routing of G "n (m, I" O) f, l elements have great influence on the life, stability and EMC of products, which should be paid special attention to.
generally speaking, there should be the following principles:0 J' q: _" A3 S0 m (Q1) placement order 3 Z 'U% d% B6' # s) V "QFirst place the fixed position components related to the structure.
such as power sockets, indicator lights, switches, connectors, etc. after these components are placed, they are locked by the lock function of the software, so that they will not be moved by mistake.
then place the special components and large components on the line.
such as heating elements, transformers, ICs, etc.
finally place the small components.
finally, place the small components#R (g5w - {$| 3V + m2) pay attention to heat dissipation. Q7 l% y5 ]9 ?! For the layout of G + X + x9 n & E / z7 u elements, special attention should be paid to heat dissipation.
for high-power circuits,
those heating elements such as power tubes and transformers should be placed as far away as possible, so as to facilitate heat dissipation. They should not be concentrated in one place, and the high capacitance should not be too close to each other, so as to avoid premature aging of electrolyte.
more specifications are required O. T3 _( b! l    s    x.
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