GPIO Reference Card V1.0.0 for Raspberry Pi - 40-Pin Header Pinout Diagram Board for Model B+ Pi 2 Pi 3 Pi 4 Zero Prototyping and DIY Electronics

Stop counting pins under your breath and risking expensive wiring mistakes. The GPIO Reference Card V1.0.0 for Raspberry Pi is an indispensable hardware accessory designed to eliminate the frustration of manual pin counting during prototyping and electronics development. Slipped directly over the Raspberry Pi's standard 40-pin GPIO header, this reference card clearly maps out every pin right where you are connecting your jumper wires and active components. Whether you are a beginner learning basic circuits or an experienced developer building complex automation systems, this breakout reference board saves time and prevents costly wiring errors by putting the complete 40-pin layout directly in your line of sight.

Constructed from high-grade FR4 printed circuit board material, the GPIO Reference Card features high-contrast silk-screen printing that clearly identifies GPIO numbering schemes, physical pin positions, 3.3V and 5V power rails, and dedicated ground pins. The physical dimensions and pin hole alignments are engineered to precision tolerances, ensuring smooth mounting and removal over standard 2.54mm pitch 40-pin male headers without bending pins or damaging the underlying Raspberry Pi single-board computer. The card is passively integrated into your workspace, requiring no external power, soldering, or software configuration, making it a truly plug-and-play educational tool for makers, students, and engineers alike.

The reference board measures standard dimensions compatible with the Raspberry Pi footprint, leaving ample clearance for surrounding ports. It is fully compatible with all 40-pin Raspberry Pi variants, including Raspberry Pi Model B+, Raspberry Pi 2 Model B, Raspberry Pi 3 Model B, Raspberry Pi 3 Model B+, Raspberry Pi 4 Model B, and the Raspberry Pi Zero / Zero W / Zero 2 W families. The surface finish resists fingerprints and component wear, maintaining legibility across countless wiring iterations.

This reference card is ideal for a wide array of DIY electronics projects, educational STEM classrooms, robotics prototyping, and IoT development. Use it when connecting sensors, actuators, LCD displays, motor drivers, and breadboards to your Raspberry Pi. It drastically streamlines the development process for Python and C++ programming tasks involving GPIO control, I2C, SPI, and UART communication protocols by providing an instant, unmistakable visual guide to pin assignments.

To use the GPIO Reference Card, simply align the 40-pin cutout holes over the male GPIO header of your powered-down Raspberry Pi and gently press downward until the card rests flush or just above the board surface. It can remain permanently installed during most prototyping workflows or used as a temporary learning aid. Ensure the orientation matches the silk-screened pin 1 indicator to guarantee accurate reference alignment with your specific Raspberry Pi model revision.

1x GPIO Reference Card V1.0.0 for Raspberry Pi