** UPDATE: You’ll be able to get these boards soon at tindie.com in the DTronixs store
I’m really pleased with the design of this MiniPiio board.
It fits it’s purpose perfectly. A small 170-pin breadboard you can plug directly onto your Raspberry Pi and have access to the GPIO pins from the RPi’s Expansion Header. You can’t see it but it has the option of a 3.3V voltage regulator to give you more current for the 3.3V for use in your circuit design.
The schematic is here: