Pololu
0.100 (2.54 mm) Female Header: 2x20-Pin, Straight
The 0.100″ (2.54 mm) 2×20-Pin Straight Female Header is a double-row, 40-pin socket strip designed to mate with standard 0.1″ pitch male headers. This is the...
The 0.100″ (2.54 mm) 2×20-Pin Straight Female Header is a double-row, 40-pin socket strip designed to mate with standard 0.1″ pitch male headers. This is the standard GPIO header size used on Raspberry Pi and other single-board computers, making it an essential connector for SBC projects.
The 2×20 configuration provides 40 pins for full GPIO access, including power, ground, I2C, SPI, UART, and general-purpose I/O lines when used with compatible boards.
Key Features
- 0.1″ (2.54 mm) Pitch – Industry-standard spacing compatible with perfboard and PCBs
- Straight Orientation – Mounts perpendicular to the PCB for standard vertical connections
- 2×20-Pin Configuration – Double-row, 40-position socket matching the Raspberry Pi GPIO layout
- Through-Hole Mounting – Solders directly to standard PCBs
Ideal For
- Raspberry Pi GPIO breakout boards and HATs
- Single-board computer accessories and shields
- Custom PCB designs requiring full 40-pin GPIO access
- Prototyping and board-to-board interconnects
Package Contents
- 1× 0.100″ (2.54 mm) 2×20-Pin Straight Female Header
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- GPIO
- General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
- Headers
- Rows of metal pins used to plug a module into a breadboard or connect it with jumper wires. Pre-soldered headers make the module easier to use straight away without needing to solder the pins yourself.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- PCB
- A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
- single-board computer
- A complete computer built onto one circuit board, usually including the processor, memory, ports, and connectors. This matters because accessories like heatsinks must match the board’s layout and mounting holes to fit properly.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
- UART
- UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.
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