How Can Pcb Be Interconnected

What are the PCB interconnection methods?

Electronic components and electromechanical components have electrical contacts, and the electrical connection between two discrete contacts is called interconnection. Electronic equipment must be interconnected according to the circuit schematic diagram in order to achieve the intended function. So what are the ways of interconnecting PCB boards? The following briefly summarizes the two:

1. Welding method

The advantages of this connection method are simple, low cost and high reliability, which can avoid the failure caused by poor contact; the disadvantage is that it is not easy to exchange and maintain. This method is generally applicable to the case where there are few external leads.

(1) PCB wire soldering

This method does not require any connectors, as long as the external connection points on the PCB printed board are directly welded to the components or other parts outside the board with wires. For example, speakers in the radio, battery box, etc.

(2) PCB cable soldering

Two PCB boards are connected by a cable, which is reliable and not prone to connection errors, and the relative position of the two PCB printed boards is not limited.

(3) Direct soldering between PCBs

Direct welding between printed boards, this method is often used for the connection of two printed boards at an angle of 90 degrees. After connection, it becomes a whole PCB printed board component.

2. The connection method of the connector

In the more complicated instruments and equipments, plug-in connection is often used. This "building block" structure not only ensures the quality of mass production of products, reduces the cost of the system, but also provides convenience for debugging and maintenance. When the equipment fails, the maintenance personnel do not need to check the component level (that is, check the cause of the failure and trace the root cause to the specific component. This work takes a lot of time), as long as it is judged which board is abnormal, it can be replaced immediately, so as to quickly eliminate the fault, shorten the downtime, and improve the equipment utilization rate. The replaced circuit board can be repaired within a sufficient time and used as a spare part after repair.

(1) Printed board socket

In more complex instruments and equipment, this connection is often used. This method is to make a printed plug from the edge of the PCB printed board. The plug part is designed according to the size of the socket, the number of contacts, the distance of the contact, the position of the positioning hole, etc., so that it matches with the special PCB printed board socket.

(2) Standard pin connection

This method can be used for external connection of printed boards, especially in small instruments, pin connections are often used. When two printed boards are connected by standard pins, the two printed boards are generally parallel or vertical, which is easy to achieve mass production.