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DIN Rail Mount MCP23017 32 Channel GPIO Expander with I2C Interface for Arduino Raspberry Pi, 3.3V/5V Power|Demo Board Accessories| - AliExpress
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Waveshare Mcp23017 Io Expansion Board I2c Interface Expands 16i/o Pins Compatible For Raspberry Pi / Micro:bit / Arduino / Stm32 - Demo Board - AliExpress
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MCP230xx IO Expander | Character LCD with Raspberry Pi or BeagleBone Black | Adafruit Learning System
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