The default font of Protel 99 SE has caused it to be complete, which can be displayed normally by changing the fonts and size used by the system. The specific method is: Click the ▼ button on the left of the File menu, select the Preferences menu item in the pop-up menu, and enter the System Preferences dialog to set the system parameters. Click the Change System Font button to make a selection of fonts and sizes;
Pay attention to familiarity and use shortcuts, which can greatly improve work efficiency;
If you are not familiar with the component library where the component is located, you can find the component library where the component is located in the way of finding the component provided by the PROTEL 99 SE system, thereby completing the addition;
Sometimes you can't find the design element from the component library of the Protel 99 SE system, you need to design new components and create new component libraries. Double-click the circuit principle in the Design Manager to enter the schematic element library editor work interface;
When the design of the completion of the schematic, select the Design> Create NetList command, or select the create netlist command in the pop-up menu of the right mouse button, the command to generate the same network table, the NetList Creation dialog box appears;
Footprint is set in the Schematic, shown in the printed circuit board (PCB);
The component package is the outer frame and solder joint position represented by the component to the PCB. Because the component package is unified, the pin of the pins and the PCB of the PCB correspond to the PCB's solder joint position, thereby ensuring that the entire PCB is connected and operated in a circuit design;
When a component is packaged in the standard package library of the PCB, you should handle your own package library to the project, and the specific size of the package should be used to achieve the actual measurement element. In the PCB diagram, Reports> Measure Distance can be used to measure the straight line distance between any two points in the figure;
When manual custom packaging, pay attention to the number of pads of the pads and the pin number of the component, otherwise it will be inferior when importing the network table in the PCB;
The role of the flying line is to guide the arrangement of the actual wire, and there is no electrical significance, or it can be called a predecessor;
The automatic wiring in the PCB is not available. It should be handwired. When wiring, pay attention to the rules of anti-interference, and the accumulation of experience is required;
In the PCB, when placing copper (shortcut ALT P G), the Grid Size text box in the Plane Settings option group is used to set the lattice spacing of the copper polygon, which is the density of copper, and the TRACK WIDTH text box is used. The copper film width of the copper is provided. When the width of the copper film is smaller than the grid point spacing, the copper placed will be present. When the width of the copper film line is greater than the grid spacing, the copper placed will be placed.
