The Adafruit GPIO Reference Card makes it easy to identify and connect wires to the Raspberry Pi's GPIO header. This ultra-thin (0.8 mm) card slides directly onto the 2×13 GPIO header, labelling each pin by function — including I²C, UART, SPI, power, and general I/O — so you can wire up your projects with confidence.

Licensed from Low Voltage Labs and updated by Adafruit with grouped pin categories, this reference card is a handy tool to keep at your workbench. Plug female jumper wires on top of the card to make connections while keeping the pin labels visible. It also makes a great keychain for Raspberry Pi enthusiasts.

Key Features

• Pin Identification at a Glance – Pins grouped by function: I²C, UART, SPI, power, and GPIO
• Ultra Thin – Only 0.8 mm thick, slides onto the header without adding bulk
• Fool-Proof Design – Can only be installed in the correct orientation
• Works with Jumper Wires – Plug female jumper wires on top of the card for easy connections

Ideal For

• Quick GPIO pin reference during prototyping
• Raspberry Pi workshops and classrooms
• Keeping pin assignments visible while wiring

Package Contents

• 1× GPIO Reference Card for Raspberry Pi Model B