A Header is a physical connector on a pcb, typically with multiple pins or sockets arranged in a 0.1" (2.54mm), 0.05" (1.27mm), 1mm or 0.5mm grid, called the "pitch" of the header.
A Header is a physical connector on a pcb, typically with multiple pins or sockets arranged in a 0.1" (2.54mm), 0.05" (1.27mm), 1mm or 0.5mm grid, called the "pitch" of the header. Other, more exotic grid pitches exist, either for legacy reasons, proprietary differentiation or for miniaturization.
Headers are commonly single or double row, though more rows are possible too.
Headers can consist of male pins or female sockets, rectangular or rounded.
