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DIN Rail Mount MCP23017 32-Channel GPIO Expander with I2C Interface for Arduino Raspberry Pi, 3.3V/5V Power - AliExpress
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Adafruit GPIO Expander Bonnet - 16 Additional I/O over I2C [STEMMA QT / Qwiic] : ID 4132 : Adafruit Industries, Unique & fun DIY electronics and kits
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