The distance from the edge of the circuit board is generally not less than 2MM. The best shape for the board is a rectangle with an aspect ratio of 3:2 or 4:3. When the size of the circuit board is larger than 200MM×150MM, the mechanical strength that the circuit board can bear should be considered. .

Arrange the position of each functional circuit unit according to the circuit flow, so that the layout is convenient for signal circulation, and the signal direction is kept as consistent as possible. Around the core components of each functional unit, layout around him. Components should be evenly, integrated and compactly arranged on the PCB, minimizing and shortening the leads and connections between components.

For most PCB beginners, it is very important to understand and master PCB layout principles and rules. This article is just a brief introduction to the layout and rules of the PCB. If you want to understand and master the layout principles and rules of PCB as soon as possible, you need to observe and learn more at work.

PCB circuit boards are an important part of all electronic devices, and PCB layout is related to the performance of the circuit. Although many softwares can realize the automatic layout of PCB, due to the continuous enhancement of signal frequency, engineers still need to understand and master the rules and principles of PCB layout.

In general, all components should be placed on the same side of the board. Only when the top-level components are too dense, some devices with limited height and low heat generation can be performed on the lower layers, such as chip resistors, chip capacitors, and chip ICs.