Typically, you’ll use an adapter board to interface ... to create their own accessories for the Raspberry Pi. Likewise, microcontrollers like the Arduino family are fairly useful for advanced ...

Such is the case with the working transputer that [Amen] has built using a Raspberry Pi ... sourced some link adapter chips (IMSC011), interfacing them through an Arduino Mega to a computer ...

Once you graduate beyond development boards like the Arduino or Wemos D1 ... mAchine (LEMPA), an add-on board for the Raspberry Pi that includes all the sockets, jumpers, and indicator LEDs ...