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Rectangular connectors, also known as headers, are electrical contacts with a uniform and standard shape usually consisting of various widths and modular cross-sections. Many sizes of rectangular pins or wires, with standard pitches and designs, are in use for various applications. Don\'t let their small and simple form fool you! They are one of the most important connectors used in today\'s high-tech products and play an essential role in all kinds of electronic products. From tiny printed circuit boards to heavy-duty industrial applications, these connectors are everywhere.

The two most commonly used rectangular connectors are standard header pins and specialty pins. Standard header pins are widely adopted as the most beneficial and economical solution for prototype and small production runs. Their simple design allows for easy soldering and modular assembly, and their versatility is ideal for prototyping and developing new ideas. Specialty pins are designed to meet the specific needs of the application. These can be customized to provide an exact fit and can be made to accommodate any design requirement. Specialty pins can be used in a variety of applications such as connecting a chain of power supplies, connecting backlights to displays, or displaying user inputs.

Constructing a header configuration requires attention to detail. The first step of selecting an appropriate header is to identify the specific requirements of the application. After the requirements are established, the user then selects the appropriate header configuration, which includes the following: number of pins, their pitch, thickness, width, type of insulation, and mounting holes. Once the configuration is established, the next step is to assemble the pins to form the header. This requires choosing the right solder wire and flux, and soldering each pin in place. The last step is to test the connection to ensure it is reliable and free of any potential issues.

The working principle of a header pin is simple. Electrical current is applied to the header and flows through the pins to the components connected to the pins. The pins act as a temporary bridge, allowing the current to flow while the electrical components complete their action. In a sense, the header pins act as runways, directing the electricity to the precise locations where it is needed.

Headers are versatile connectors which can simplify the task of connecting a wide variety of electronic components. By keeping the pins consistent in their respective locations, headers can eliminate handling the individual components and make it easier for assembly and troubleshooting. The working principle behind headers is designed to ensure that the electricity is directed correctly to the components for a reliable connection. They are an essential part of any electronic prototype or product, and their ability to provide one unified connection simplifies the process of connecting various components.

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