This tiny Raspberry Pi Zero Perf HAT is ideal for building small, custom, circuits on the Raspberry Pi Zero. We have designed this board to break out all of the important pins, there isn’t enough room to breakout every single one, but enough to be quite useful for small projects. There is easy access to 5V, 3.3V, and GND as well as the UART, I2C, SPI, and a bunch of digital pins  – definitely enough to get by in most cases! Two 8 x 11 blocks of plated through holes are available (less a couple where the mounting holes are located). The holes are not interconnected in any way, allowing for maximum density of components.