In printed circuit board (PCB) design, many engineers encounter various issues, one of which is whether “three wires can be routed from the circuit board?” The answer is yes; the pads or connection points on a PCB can connect and route multiple wires, including three wires.
1. Why Can Three Wires Be Routed From A PCB?
The pads or connection points on a PCB are connected to wires or components through soldering or other connection methods (such as connector connections). These connection points can connect one or multiple wires, thus enabling external connections and electrical signal transmission for the circuit board.
In the design, based on the circuit’s functionality and wiring requirements, multiple wires can be routed from a single pad.
2. How To Route Three Wires From A PCB?
① Reasonable Layout
First, when designing a PCB, the layout of pads and wires should be reasonably planned based on the circuit function and wiring requirements, ensuring there is enough space between pads to accommodate the connection of multiple wires, avoiding crowding and confusion;
② Wire Soldering
Solder one end of the wire to the pad on the PCB. Attention should be paid to the following parts:
The soldering pads for the wires should be as close to the edge of the PCB as possible and arranged in a uniform size to facilitate soldering and maintenance.
To improve the mechanical strength of the wire connection and avoid pulling the pad or printed wire off due to wire tension, holes can be drilled near the solder points on the PCB, allowing the wire to pass through the via from the soldering side of the printed board and then insert into the pad hole from the component side for soldering.
Arrange or bundle the wires neatly and secure them to the board with wire clips or other fasteners to prevent the wires from breaking due to movement.
③ Wire Specifications
When selecting wires, the cross-sectional area and type of the wire should be determined based on the circuit’s operating current, voltage, and frequency parameters. Additionally, the wire’s temperature resistance, corrosion resistance, and other performance requirements should also be considered;
④ Wiring Rules
When wiring, follow certain rules and standards. For example, the input and output terminals should avoid being adjacent and parallel, and the ground wire width should be greater than that of the power and signal wires;
⑤ Testing and Verification
After completing the PCB production and wiring, testing and verification should be conducted to ensure the electrical performance and reliability of the circuit board meet design requirements, including continuity testing, voltage withstand testing, insulation testing, etc.
This article is an original work by Fanyi Education; please indicate the source for reprints!