Description 32 Digital Inputs/Outputs Control via the Raspberry Pi I2C port Stack up to 4 IO Pi boards on a single Raspberry Pi Solder jumper selectable I2C addresses External 5V Input with isolation solder jumper Based on the MCP23017 from Microchip Technologies Inc The 32 Channel Digital Expansion HAT for Raspberry
Simplifying Digital Making
Waveshare 2-Ch Isolated CAN Expansion HAT for Raspberry Pi, Dual Chips Solution - RobotShop
Serial Expansion HAT for Raspberry pi Onboard SC16IS752 2 Channels(2-ch) UART 8 GPIOs I2C Interface Stackable to 16 Modules to 32-ch UART : Electronics
Simplifying Digital Making
Raspberry Pi Hat - Eckstein Shop
IO Expansion HAT for Raspberry Pi 5 / 4B / 3B+ - DFRobot
Waveshare High-Precision ADC HAT ADS1263 10-Ch 32-Bit for Raspberry Pi - RobotShop
I2C HAT for Raspberry Pi 2 & 3 - RobotShop
Simplifying Digital Making
IO Expansion HAT for Raspberry Pi 5 / Zero / Zero W / 4B / 3B+ - DFRobot
Waveshare 2-Channel Isolated RS485 Expansion HAT for Raspberry Pi - RobotShop
IO Zero 32 The Pi Hut
32 Channel Digital Expansion HAT for Raspberry Pi - RobotShop
Sequent Microsystems 8 MOSFETS 8-Layer Stackable HAT for Raspberry Pi - RobotShop
Gravity: IO Expansion HAT for Raspberry Pi