1. PCB design should follow a specific order, such as progressing from left to right and from top to bottom.
2. The width of the traces and the spacing between them should be appropriately sized, with the distance between capacitor pads matching the spacing of the capacitor’s lead pins as closely as possible.
3. During the wiring diagram design, minimize the number of traces and ensure that the routing is straightforward and uncluttered.
4. In designing the wiring diagram, ensure the correct pin arrangement sequence and maintain reasonable spacing between components.
5. Wiring direction:
From the surface of the soldering, the arrangement of components should align closely with the schematic diagram, and the wiring direction should follow the circuit diagram’s line direction. Because the production process often requires testing various parameters on the soldered surface, it is crucial to verify production, debugging, and repair processes while maintaining circuit performance and adhering to machine installation and panel layout requirements.
6. While ensuring circuit performance, strive for efficient wiring design with minimal external connections across lines. Wiring should meet charging requirements, be intuitive, easy to install, and facilitate height and maintenance considerations.
7. The arrangement and distribution of each component should be reasonable, uniform, and strive for a neat, aesthetically pleasing, and structurally strict layout.
8. Layout direction of inlet and outlet terminals:
(1) The distance between the two leads at the end should not be too large, generally around 2 to 3/10 inches.
(2) Incoming and outgoing lines should be concentrated on one or two sides as much as possible and should not be too dispersed.
9. Potentiometer and IC seat placement principles:
(1) Potentiometer: Used for adjusting the output voltage in voltage regulators, the potentiometer should be designed so that turning it fully clockwise increases the output voltage and counterclockwise decreases it. For adjustable constant current chargers, the potentiometer should increase current when turned clockwise. Position potentiometers according to full machine structure installation and panel layout requirements, ideally on the edge of the plate with the rotating handle facing outward.
(2) IC seat: When designing the printed circuit board, ensure the positioning slot on the IC seat is correctly aligned. Each IC pin position must be accurate; for example, the first pin should be in the lower right or upper left corner of the IC seat and close to the positioning slot (from the soldering surface).
10. Position and direction of resistors and diodes in PCB layout:
PCB design can be either horizontal or vertical:
(1) Horizontal: When the number of circuit components is small and the circuit board is large, a horizontal layout is generally preferable. For resistors below 1/4W, the pad distance is typically 4/10 inches; for 1/2W resistors, it is 5/10 inches. For diodes, the distance for 1N400X series rectifiers is usually 3/10 inches, and for 1N540X series rectifiers, it is 4 to 5/10 inches.
(2) Vertical: When the number of circuit components is higher and the circuit board is smaller, a vertical layout is commonly used. In this case, the distance between the two pads is generally 1 to 2/10 inches.
2. The width of the traces and the spacing between them should be appropriately sized, with the distance between capacitor pads matching the spacing of the capacitor’s lead pins as closely as possible.
3. During the wiring diagram design, minimize the number of traces and ensure that the routing is straightforward and uncluttered.
4. In designing the wiring diagram, ensure the correct pin arrangement sequence and maintain reasonable spacing between components.
5. Wiring direction:
From the surface of the soldering, the arrangement of components should align closely with the schematic diagram, and the wiring direction should follow the circuit diagram’s line direction. Because the production process often requires testing various parameters on the soldered surface, it is crucial to verify production, debugging, and repair processes while maintaining circuit performance and adhering to machine installation and panel layout requirements.
6. While ensuring circuit performance, strive for efficient wiring design with minimal external connections across lines. Wiring should meet charging requirements, be intuitive, easy to install, and facilitate height and maintenance considerations.
7. The arrangement and distribution of each component should be reasonable, uniform, and strive for a neat, aesthetically pleasing, and structurally strict layout.
8. Layout direction of inlet and outlet terminals:
(1) The distance between the two leads at the end should not be too large, generally around 2 to 3/10 inches.
(2) Incoming and outgoing lines should be concentrated on one or two sides as much as possible and should not be too dispersed.
9. Potentiometer and IC seat placement principles:
(1) Potentiometer: Used for adjusting the output voltage in voltage regulators, the potentiometer should be designed so that turning it fully clockwise increases the output voltage and counterclockwise decreases it. For adjustable constant current chargers, the potentiometer should increase current when turned clockwise. Position potentiometers according to full machine structure installation and panel layout requirements, ideally on the edge of the plate with the rotating handle facing outward.
(2) IC seat: When designing the printed circuit board, ensure the positioning slot on the IC seat is correctly aligned. Each IC pin position must be accurate; for example, the first pin should be in the lower right or upper left corner of the IC seat and close to the positioning slot (from the soldering surface).
10. Position and direction of resistors and diodes in PCB layout:
PCB design can be either horizontal or vertical:
(1) Horizontal: When the number of circuit components is small and the circuit board is large, a horizontal layout is generally preferable. For resistors below 1/4W, the pad distance is typically 4/10 inches; for 1/2W resistors, it is 5/10 inches. For diodes, the distance for 1N400X series rectifiers is usually 3/10 inches, and for 1N540X series rectifiers, it is 4 to 5/10 inches.
(2) Vertical: When the number of circuit components is higher and the circuit board is smaller, a vertical layout is commonly used. In this case, the distance between the two pads is generally 1 to 2/10 inches.
