Adafruit GPIO Reference Card for Raspberry Pi Model B

This board makes connecting wires to the Raspberry Pi GPIO incredibly easy. It's a reference board that makes it really easy to see if you're connecting your wires correctly. We liked the Pi GPIO Reference Board from Low Voltage Labs so much that we worked with them to license their design! We made some changes to the Low Voltage version - including grouping the pins into categories like I2C, IO, UART, SPI, and power.