What are the precautions for PCB circuit board design?
Designing a circuit is a hard work that electronic engineers must master. If the circuit board is designed unreasonably, the performance will be greatly reduced, and it may even not work properly in severe cases. So, what are the precautions for PCB circuit board design? 1. Making a physical frame with a closed physical frame is very important for the future component layout and wiring. It must be accurate, otherwise there will be installation problems in the future. It is best to use arcs at the corners. On the one hand, it can avoid sharp corners from scratching workers, and at the same time, it can reduce stress. 2. The layout of components The layout and wiring of components have a great impact on the quality of the product. The following principles should be followed: (1) Place the components in fixed positions related to the structure in the order of placement, such as power sockets, indicator lights, Switches, connectors, etc.; then place special components and large components on the line, such as heating components, transformers, ICs, etc. Finally, place the small device. (2) Pay attention to heat dissipation. For high-power circuits, the heating elements should be placed as close to the side as possible to facilitate heat dissipation, and do not concentrate in one place. 3. Reasonable wiring should follow the following wiring principles: (1) High-frequency digital circuit traces should be thinner and shorter; (2) High current signals, high voltage signals and small signals should be separated from each other; (3) Double When wiring the panel, the wires on both sides should be perpendicular, oblique, or bent to avoid parallel to each other to reduce parasitic coupling; (4) The wiring corner should be as large as possible to be greater than 90 degrees, and corners below 90 degrees should be avoided; (5) ) For the same address line or data line, the length of the trace should not be too different; (6) Try to walk the trace on the soldering surface; use as few vias and jumpers as possible; (7) Don't put the components and traces too close to the side; (8) Convenience of production, debugging, and maintenance must be considered. 4. After adjustment and perfection of wiring, all you need to do is to make some adjustments to text, individual components, wiring, and copper. If you use copper instead of the ground wire, you must pay attention to whether the entire ground is connected, the current size, flow direction, and whether there are special requirements to ensure that unnecessary errors are reduced. 5. Check and check the network. Sometimes the network relationship of the circuit board drawn is different from the schematic diagram due to negligence. At this time, it is necessary to check and check. 6. Using the simulation function to do so can find some problems in advance and greatly reduce the workload of future debugging. The above are the precautions in PCB circuit board design summarized by professional PCB engineers based on years of experience. I hope it can be enlightened to you.