The first and fourth layer PCB design drawing program:
1. Draw a circuit diagram and make a netlist.
Among them, the process of drawing schematic diagram involves drawing elements and packaging, so it is no problem to master these two kinds of schematic diagrams. The elimination of errors and warnings can solve general problems. You can use hierarchical diagrams to draw complex schematic diagrams.
Shortcuts used here: Ctrl+G (to set the mesh spacing), CTRL+M (to measure the distance between two points)
2.pcn designs the board.
How many boards are used? Do you use one-sided elements or two-sided? What is the size of the board? wait a minute
3. Set the parameters.
Layout parameters. Slab parameters. Basically according to the system default values, only a few parameters are set.
4. Loading network tables and package.
Design-> update PCBDocumentUSB.PcbDoc
Note: If there is an error in drawing the schematic diagram, but the layout of the PCB has been designed, and it is hoped that the error can be corrected without affecting the layout of the PCB, then this step must be carried out. Do not check the Add only in front of AddROOMS! ! ! Otherwise, it will be revised, which is really painful! !
The network table is the interface between the editing software of circuit schematic diagram and the PCB design software of printed circuit board. Only when the circuit board is loaded can the circuit board be automatically wired.
5. Layout of components.
Most of them are laid out manually, or combined automatically and manually.
If you want to place the components on both sides: select the device, press the left mouse button, and then press the L key; Or click the component under the PCB interface, and change its attribute to bottomlayer.
Note:
Uniform discharge of parts, easy installation, plug-in and welding operation. The typesetting level of characters, reasonable position, attention to direction, avoiding being blocked, and easy to make.
6.pcb wiring
Self-provided wires: manual wiring (layout should be planned before wiring, and the internal electrical layer should be coordinated. The internal electrical layer should be hidden for wiring. The internal electrical coating is generally a complete copper film, and the pads and the copper film have the same net name. When passing through the internal electrical layer, the system will automatically connect them with the copper film. The connection mode and safe distance between the reticulated copper sheet and the non-reticulated pads/vias and the internal electrical layer can be set according to the regulations.