What are the basics of PCB wiring, what are the basics of PCB design?

Summary. As a novice in PCB design, I think the introductory knowledge that needs to be mastered are: 1. Proficient in PCB drawing tools, such as entry-level AD or PROTEL99, or relatively professional and familiar with the limit values and classic values of different processes of PCB production, so as to improve production yield and production efficiency.

3. Learn basic electronic circuits and be familiar with commonly used module circuits. Have a certain understanding of heat dissipation, common ground, grounding treatment, etc. 4. If there is no opportunity to invest in the production of the board is the best (the old bird is also practiced), if not, it has been created, and now dozens of dollars can be played on the board (if you do it well, you can also hang salted fish to dispose of it), like I can only use ferric chloride, copper clad laminates, thermal printers, transfer paper, electric irons...Pure handmade board - the following is the work in person, time flies so fast!

<> you're waiting a minute.

As a novice PCB designer, I think the introductory knowledge that needs to be mastered are: 1. Be proficient in PCB drawing tools, such as entry-level AD or PROTEL99, or be relatively professional and familiar with the limit values and classic values of different processes of PCB production, so as to improve production yield and production efficiency. 3. Learn basic electronic circuits and be familiar with commonly used module circuits.

Have a certain understanding of heat dissipation, common ground, grounding treatment, etc. 4. If there is no opportunity to invest in the production of the board is the best (the old bird is also practiced), it has been created if there is no it, and now dozens of dollars can be played on the board (if you do it well, you can also hang the salted fish to dispose of it), like I can only use ferric chloride, copper clad laminates, thermal slag printers, transfer paper, electric irons....Pure handmade board - the following is the work in person, time flies so fast!

Kiss! Hello, happy to answer your <>

The principles of pro-PCB wiring are as follows: 1) The length and method of wiring The laying of wires should be as short as possible; Each address line or data line of the same component should be kept as long as possible; The corners of the printed wire should be rounded; When the layout is double-sided, the wires on both sides should be avoided parallel to reduce parasitic coupling; Printed wires used as inputs and outputs of circuits should be avoided as close to each other as possible, and ground wires should be added between them. 2) Routing width The minimum width of the PCB wire should not be less than, in the high-density, high-precision printed circuit, the wire width and spacing are generally desirable; In the case of high current, the single-sided experiment shows that there is no obvious temperature rise when the copper thickness is 50um and the wire width is 1 and the overcurrent is 2A. The common ground wire of the printed wire is as thick as possible, usually using lines greater than 2 3 mm (80 120 mil); The 10-10 and 12-12 principles can be used for wiring between the IC pins in the DIP package

When two wires pass between two pins, the pad diameter can be set to 50 mil and the line width and line spacing are both 10 mil. When only one wire passes between the pins, the pad diameter is 64mil, and the line width and line spacing are both 12mil. 3) Wiring spacing The spacing of the wires should be as wide as possible, and should be larger if the relevant technical pins allow the metal residues of the magic seed between the wires.

4) Crossover problem For crossover problems in PCB, crossover lines are not allowed, which can be solved by two methods: "drilling" and "winding". If the circuit is responsible, wire jumps are allowed to simplify the design. 5) For the shielding and grounding of the printed wire, the common ground wire of the printed wire should be arranged at the edge of the PCB as much as possible.

In addition, the pattern of the ground and power supply should be as parallel as possible to the direction of the flow of data, which is the secret of increased noise suppression; Hope mine can help you <>

Do you have any other questions?

Preparation includes the preparation of the component library and schematic. Before proceeding with PCB design, the schematic SCH component library and PCB component footprint library should be prepared first. Ideally, a PCB component footprint library is built by an engineer based on the standard dimensions of the selected device.

In principle, the component package library of the PC is established first, and then the SCH component library of the schematic is established. PCB component packaging library has high requirements, which directly affects the installation of PCB; The requirements for the schematic SCH component library are relatively relaxed, but attention should be paid to defining the pin properties and the correspondence with the PCB component package library.

PCB structure design.

According to the determined circuit board size and various mechanical positioning, draw the PCB board frame in the PCB design environment, and place the required connectors, key switches, screw holes, assembly holes, etc. according to the positioning requirements. Fully consider and determine the routing area and the non-routing area (e.g., how much of the area around the screw hole belongs to the non-routing area).

PCB layout design.

PCB layout design is the first important process in the whole PCB design process, the more complex the PCB board, the better the layout can directly affect the difficulty of the later wiring.

Layout design relies on the circuit board designer's basic circuit skills and design experience, which is a high-level requirement for circuit board designers. Junior circuit board designers have little experience and are suitable for small module layout design or PCB layout design tasks with low difficulty of the whole board.