28-Pin Single Header Description A 28-pin single header is a type of electrical connector commonly used in electronic circuits for board-to-board or board-to-cable connections. It consists of a row of 28 metal pins arranged in a single straight line, housed within a plastic insulator. These headers are widely utilized in prototyping, embedded systems, and various consumer electronics due to their simplicity, reliability, and ease of use. Construction and Design The 28-pin single header is typically made of high-quality materials to ensure durability and efficient signal transmission. The pins are usually constructed from phosphor bronze or brass, often plated with gold, tin, or nickel to enhance conductivity and resist corrosion. The plastic housing is made from high-temperature thermoplastics such as nylon or polyamide, providing mechanical strength and insulation between pins. The standard pin spacing (pitch) for these headers is 0.1 inches (2.54 mm), which is compatible with most breadboards and PCBs. The pins may be either through-hole or surface-mount (SMT), allowing flexibility in different assembly processes. Applications 28-pin single headers serve multiple purposes in electronics: - PCB Interfacing: They facilitate connections between different circuit boards, such as linking a microcontroller board to a peripheral module. - Prototyping: Used in breadboards and development kits to establish temporary connections for testing circuits. - Internal Wiring: Often employed in devices like computers, industrial controllers, and communication equipment for internal wiring and signal routing. - Custom Connectors: Can be paired with female headers, sockets, or ribbon cables to create modular and detachable connections. Advantages - Compact and Lightweight: The single-row design saves space while maintaining a high pin count. - Cost-Effective: Simple manufacturing makes them an economical choice for mass production. - Versatile: Compatible with various mating connectors, including IDC cables and shrouded headers. - Reliable: Secure pin retention ensures stable electrical connections even under vibration or movement. Variations Different versions of 28-pin single headers include: - Straight vs. Right-Angle: Straight headers are used for vertical PCB mounting, while right-angle versions allow horizontal connections. - Tall vs. Low-Profile: Some headers have extended pins for deeper PCB insertion, while low-profile types save vertical space. - Stackable: Certain designs enable stacking multiple boards in parallel. Conclusion The 28-pin single header is a fundamental component in electronics, offering a balance of functionality, durability, and ease of integration. Its standardized design ensures compatibility across a wide range of applications, making it indispensable in both hobbyist and professional projects. Whether used in simple circuits or complex systems, this connector remains a reliable solution for efficient signal and power transmission.