Check the listing for details. Adafruit Perma-Proto HAT for Raspberry Pi, without EEPROM, 2310. Condition: New. Listed at 17.31 USD. Overview of the Adafruit Perma-Proto HAT for Raspberry Pi: Designed for Raspberry Pi models with 2x20 connection: Zero, A+, B+, Pi 2, Pi 3 and Pi 4. Provides a 0.1" prototyping hole grid for mounting components such as chips, resistors, LEDs and potentiometers. The holes are connected to conductor tracks on the underside, similar to a breadboard. Arranged power rails for +3V, +5V and GND. Almost all relevant Pi pins are brought out (except pin #26). No EEPROM, avoids collisions with other HATs. Customizable through different GPIO header options for different stacking preferences. Some soldering required to attach the header to the PCB. Not compatible with Raspberry Pi models A or B with 2x13 connection. The color markings for +3V and +5V are blue, GND is red (future versions will swap thes.