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OPRN-SMART PCF8575 IO Expander Module I2C to 16IO for Arduino
Have you run out of I/O pins? This great module allows the user to expand up to 16 I/O using only two I/O for control! The PCF8575 is controlled through an I2C interface and features 16-bits of quasi-bidirectional input/output pins. On board 3.3V level converter circuit£¬ if you donot solder VCC-VDD pad£¬ the PCF8575 level is 3.3V. If you solder it£¬ the level will be the same with VCC. Features: - Arduino available library: PCF8575 - Working voltage: 2.5 - 5.5VDC - Working current: 100mA(MAX) - I2C address: 0x20(default)£¬can be modified by soldering A1 and A2 selection pads. - 16 individually addressable pins. - Each pin configurable for input or output. - Open-drain interrupt output pin for input change interrupt. - Great for Arduino UNO R3 and other MCU to control simple relay£¬ buzzer£¬ button£¬ led.