Adafruit-Perma-Proto-HAT-for-Raspberry-Pi-A-B-or-2-Adafruit-2310-p-The-b-Adafruit-Perma-Proto-HAT-b-is-a-plug-in-daughterboard-that-is-compatible-with-the-Raspberry-Pi-A-B-&-Pi-2-The-board-has-a-grid-of-0-1-prototyping-solder-holes-for-attaching-chips-resistors-LEDs-potentiometers-etc-to-create-a-versatile-&-easy-to-use-prototyping-area-The-holes-are-connected-underneath-with-traces-to-mimic-solderless-breadboards-&-there-are-long-power-strips-for-3V-5V-&-earth-co