Connector is a component of our electronic engineering technician regular contact. Its role is very simple: in between the circuit is blocked at the barrier or isolated circuits, bridge the communication gap, so that the current flow, the circuit to achieve a predetermined function. Connectors are electronic devices indispensable component, observe current flow along the path, you will always find one or more connectors. Connector form and structure is changing, with different application object, frequency, power, and other application environments, there are a variety of different types of connectors. For example, the lighting on the court with the connector and the hard drive connector, and ignite the rocket connector is very different. But no matter what kind of connector, must ensure a continuous and smooth flow of current and reliable. It refers to, the connector is not limited to the electric current is turned on, the rapid development of photonics technology today, the fiber optic system, light is transmitted carrier signal, instead of ordinary glass and plastic in the circuit conductors, but the optical signal path is also used in connectors, their role and the same circuit connector.