PCB Board Component Placement and Wiring Directions
- The orientation of PCB board components determines wiring direction.
- Adjacent layers should have different wiring directions; the top layer and solder layer should be at a 90-degree angle.
- Vertical wiring is recommended for rectangular circuit boards to avoid congestion.
- Ensure adequate wiring space to avoid complications.
Analog and digital circuit components should be separated by at least 5mm to prevent signal interference. Proper analysis of ground wires is crucial, especially on multi-layer boards. Power and ground lines are essential for electrical performance.
Power and ground lines are like the aorta and veins of the human body, determining current flow and heat dissipation. Wide lines enhance current flow, while narrow lines increase resistance.
For power and ground lines, use wide copper foil on the soldering surface. Capacitors between power and ground lines help reduce issues. Surround critical components with ground wire copper foil to address electromagnetic interference.
When wiring the crystal oscillator, use ground wire copper foil for anti-interference. Thermal pads can prevent poor soldering due to rapid heat dissipation. Position the output part close to the power supply for analog circuit power supplies.
On multi-layer boards, route power to the inner layer strategically for optimal performance.
