Pioneer600 is special designed HAT for Raspberry Pi single board computer. Very comprehensive HAT for learning different type of components and for prototyping. With this HAT, you can interface with different types sensor, there are A/D and D/A converter, OLED (monochrome) for display text and graphic, USB to Serial/UART converter, Active buzzer for audio output, read environmental pressure, expand IO, real time clock, there is also joystick and IR receiver for remote control.
I would truely recommend this HAT for those learning electronics and coding, not to forget if you are doing project that require those data and interface.