1. Reasonable division of functional areas
In the reverse design of a sound PCB circuit board, reasonable division of functional areas can help engineers reduce unnecessary trouble and improve the efficiency of drawing.In general, components with the same function on a PCB board will be arranged in a centralized way, and the area divided by the function can be conveniently and accurately based on the reverse schematic diagram.
However, this division of functional areas is not arbitrary.It requires engineers to have some knowledge of electronic circuits.First, find out the core elements of a functional unit, and then find out other elements of the same functional unit by following the routing connection, forming a functional division.The formation of functional zoning is the basis of schematic drawing.Also, in the process, don't forget to use the component Numbers on the circuit board in a clever way, they can help you to quickly partition the functionality.
2. Find the right benchmark
This reference piece can also be said to be the main part PCB network city that is used at the beginning of schematic drawing. After determining the reference piece, drawing according to the pins of these reference pieces can guarantee the accuracy of schematic diagram to a greater extent.
Benchmark for engineers, a sure is not very complicated things, in general, can choose to play a leading role in the circuit components as a benchmark, they generally larger, pin more, convenient drawing, such as integrated circuit, transformer, transistor, etc., are suitable as a benchmark.
3. Correctly distinguish lines and reasonably draw wiring
For the distinction of ground wire, power cord and signal wire, the engineer should also have relevant power supply knowledge, circuit connection knowledge, PCB wiring knowledge and so on.The division of these circuits can be analyzed from the connection of components, width of copper foil and characteristics of electronic products.
In wiring drawing, in order to avoid line crossing and interpenetration, grounding symbols can be used for a large number of ground lines, different lines can be used for different colors to ensure clarity and discrimination, special marks can be used for various components, and even unit circuits can be drawn separately and then combined.