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This is a great I2C Serial Interface. As the pin resources for Arduino controller is limited, your project may be not able to use normal LCD shield after connected with many sensors or interfaces. With this I2C interface module, you will be able to realize data display via only 2 wires. Fantastic for Arduino based project.
1 x I2C Serial Interface Board Module
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PCF8574 I2C to 8-Bit I/O Expander
The PCF8574 module is used to expand the input/output (I/O) por..