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Flat flexible connectors, commonly known as FFC and FPC, are popular among electrical engineers and hobbyists for their small size and flexibility. The connectors are also widely used in many applications, including battery connectors, flat panel displays, cameras, laptops, and wearable devices. Because of their ability to retain flexing or bending during use, they are often used in applications where bending of connections is required or desirable.

FFC/FPC connectors are normally composed of circuit boards, a protective plastic or metal housing, and contacts. The basic design consists of two rows of contacts given a pitch diameter of 0.8mm or 1mm and a total number of 12, 24, 36, 40, 44, 56, or 80 contacts. Depending on the type of connection, there are single-row, double-row, and multi-row connectors available. Typically, the contacts are made from a combination of copper and plastic materials and are usually protected from corrosion and wear by gold plating.

The purpose of FFC and FPC connectors is to provide quick and reliable electric connections between multiple assemblies. To familiarize yourself with the product, it is essential to have a basic understanding of the operating principles.

An FFC/FPC connector consists of two mating parts: a male blade and a female blade. The male blade consists of a plastic strip with contacts along one side, while the female blade consists of a plastic strip with contacts along the other side. When the blades are inserted into each other, the pins on the male blade contact the receptacles on the female blade. When the two parts are mated, the contacts on the male blade and those on the female blade make the connection, enabling the electric signal to pass.

Depending on the application, the FFC/FPC connectors can be used as a permanent, non-permanent, or a semi-permanent connection. Permanent connections involve soldering the blades together, while for a non-permanent or semi-permanent connection, a removable locking mechanism is employed. This is done by inserting the male blade into the female blade and locking them together using a pair of clips. The clips are held in place by a spring, ensuring that the pressure applied to the blades is consistent when the connector is mated. The removable locking mechanism makes it easier to disconnect the connection without damaging the contacts.

FFC/FPC connectors are popular in a wide variety of applications, from power supplies to PCs, DVDs to mobile phones. In power supplies, FFC connectors are used to connect power converters and switching regulators. In laptops, the connectors are used to connect the internal components, such as the processor, memory, hard drive, and cooling fan, to the motherboard. In DVD players, FFC connectors are used to connect the drive motor to the circuit board. In mobile phones, the connectors are used to connect the speakers and display to the circuit board. The connectors are also used to connect sensors, display screens, and keyboards to the circuit board.

FFC/FPC connectors are ideal for applications where bending of connections is required or desired, due to their small size and flexibility. Furthermore, the connectors are relatively inexpensive, and the removable locking mechanism makes them easy to install and remove. Although the connectors require more space and assembly time than traditional wire-to-board connectors, they are still an attractive and viable option for many electrical applications.

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