The Prototyping HAT for Raspberry Pi Zero is a useful and versatile prototyping expansion board for the Raspberry Pi Zero computer. All of the Raspberry Pi GPIO pins except GPIO 24, ID_SC and ID_SD are broken out into separate pads and 3.3 volt, 5 volt and ground rails run down the sides of the prototyping area on board. The board has a working area with pads arranged into groups of three pins. The board is supplied as a ready to solder kit with a 40-pin header to connect to the Raspberry Pi.