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Adafruit MCP23017 I2C GPIO Expander Breakout [STEMMA QT / Qwiic] : ID 5346 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Adafruit GPIO Expander Bonnet - 16 Additional I/O over I2C [STEMMA QT / Qwiic] : ID 4132 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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32 Channel Digital Expansion HAT for Raspberry Pi - RobotShop
Overview | Adafruit GPIO Expander Bonnet for Raspberry Pi | Adafruit Learning System
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![Adafruit GPIO Expander Bonnet - 16 Additional I/O over I2C [STEMMA QT / Qwiic] : ID 4132 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits](https://cdn-shop.adafruit.com/970x728/4132-07.jpg "Adafruit GPIO Expander Bonnet - 16 Additional I/O over I2C [STEMMA QT / Qwiic] : ID 4132 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits")
Adafruit GPIO Expander Bonnet - 16 Additional I/O over I2C [STEMMA QT / Qwiic] : ID 4132 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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How To Use A MCP23017 I2C Port Expander With The Raspberry Pi - Part 1 - Raspberry Pi Spy
Din Rail Mount Mcp23017 32-channel Gpio Expander With I2c Interface For Arduino Raspberry Pi, 3.3v/5v Power - Demo Board Accessories - AliExpress
