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The design process of printed circuit board includes drawing circuit schematic diagram, planning printed circuit board, component packaging, component layout, automatic wiring, manual adjustment, saving output, etc. The following is the design process of the printed circuit board.

(1) Draw circuit diagram principle.

This is the basis of circuit board design, mainly to complete the drawing of circuit schematic diagram and generate network reports.

(2) Plan the circuit board.

Before drawing the circuit board, the user should make a preliminary plan for the circuit board, including setting the physical size of the circuit board, using several layers of circuit boards, packaging and installation of components, etc., which determines the framework for the design of the later printed circuit board.

(3) Set parameters.

It mainly sets the distribution parameters and wiring parameters of components. Usually, these parameters can be selected from the system's default values, or they do not need to be modified after a single setting.

(4) Component packaging.

The so-called component packaging is the shape of the component. Each component installed in the printed circuit board should have corresponding packaging, so as to ensure the normal wiring of the circuit board.

(5) Component layout.

After the planned circuit board, the components can be placed into the circuit board frame. The automatic wiring function provided by protel 99 SE can be used to automatically route the components.

(6) Automatic routing

Protel 99 SE provides a powerful automatic wiring function, which can automatically route the arranged components. Generally, the automatic wiring will not make mistakes.

(7) Manual adjustment

After the automatic wiring is completed, users can adjust the special components to ensure that they comply with the corresponding rules, so as to ensure that the anti-interference of the circuit board meets the standard.