The Pi Port Extender is an add on prototyping board from Tinysine which
designed for the Raspberry Pi 3/Pi 2/Model B+/Model A+ that can break out all the
power, GPIO, I2C and SPI pins from the 40-pin header onto a solderless
breadboard.
You can plug the 40-pin GPIO cable between the Pi computer and the Pi
Port Extender. The Pi Port Extender can plug into any solderless
breadboard. all the pins labeled on the PCB. It's more easy to build
your own circuit prototype with it.
Shipping list: