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Adafruit PCF8575 I2C 16 GPIO Expander Breakout [STEMMA QT / Qwiic] : ID 5611 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Pcf8575 Io Expander Board Module I2c to 16io Iic I2c I/O Extension Shield Module - China Pcf8575 Module, Io Expander Module I | Made-in-China.com
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