This is the SparkFun Pi Wedge B+, a small board that connects to the 40-pin GPIO connector on the Raspberry Pi B+, and breaks the pins out to breadboard-friendly arrangement and spacing, and even adds a couple of decoupling capacitors on the power supply lines. The “Wedge” also makes the initial bring up process easier - you can plug an FTDI Basic module into the built-in serial port. Each Pi Wedge B+ comes as an easy to assemble kit that can be inserted into the RPi’s GPIO port that allows you to prototype as soon as you are done soldering.
The Pi Wedge B+ is compatible with Raspberry Pi B+ model and it adapts the GPIO header on the B+ to a standard solder less breadboard, such as our medium, large, and extra large breadboards. While it will technically with a mini breadboard, it won’t leave much room for external circuitry. If you love the Raspberry Pi and have been looking to start prototyping with it look no further than the Pi Wedge B+!