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Adafruit GPIO Reference Card for Raspberry Pi Model B+/Pi 2/Pi 3

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Adafruit GPIO Reference Card for Raspberry Pi Model B+/Pi 2/Pi 3

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 2×20 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+/Pi 2/Pi 3
Note: This card is designed for Raspberry Pi models with a 2×20 GPIO header (Model B+, Pi 2, Pi 3). It is not compatible with the original Raspberry Pi Model B which uses a 2×13 header — see the Model B version instead.
$1.46

Original: $4.87

-70%
Adafruit GPIO Reference Card for Raspberry Pi Model B+/Pi 2/Pi 3—

$4.87

$1.46

Product Information

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Description

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 2×20 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+/Pi 2/Pi 3
Note: This card is designed for Raspberry Pi models with a 2×20 GPIO header (Model B+, Pi 2, Pi 3). It is not compatible with the original Raspberry Pi Model B which uses a 2×13 header — see the Model B version instead.