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![Nettigo: PCF8574 Module - 8-bit I/O Expander for I2C Bus [Yā nǔ shén]](https://nettigo.eu/system/images/2080/original.jpg?1488806860 "Nettigo: PCF8574 Module - 8-bit I/O Expander for I2C Bus [Yā nǔ shén]")
Nettigo: PCF8574 Module - 8-bit I/O Expander for I2C Bus [Yā nǔ shén]
Hobbybotics PCF8574A I2C I/O Expander | Hobbybotics
I2C Input & Output Module - NIKOLAUS-LUENEBURG.DE
