PCB component wiring rules

　　1. Within the area of ≤ 1mm from the edge of the PCB board and within 1mm around the mounting holes, wiring is prohibited;

　　2. The power cord should be as wide as possible and not less than 18mil; The signal line width should not be less than 12mil; The CPU input and output should not be less than 10mil (or 8mil); The line spacing shall not be less than 10 mil;

　　3. Normal through-hole not less than 30mil;

　　4. Dual in-line insertion: solder pad 60mil, aperture 40mil;

　　1/4W resistor: 51 * 55mil (0805 sticker); When inserting directly, the solder pad is 62mil and the aperture is 42mil;

　　Infinite capacitor: 51 * 55mil (0805 sticker); During direct insertion, the solder pad is 50mil and the aperture is 28mil;

　　5. Please note that the power and ground wires should be as radial as possible, and the signal wires should not have looped wiring.