xcluma PCF8575 Expansion Board Module IO Port Expander DC 2.5-5.5V I2C Electronic Components Electronic Hobby Kit

"Description: Have you run out of I/O pins? This powerful module allows users to expand up to 16 I/O using only two I/O for control! The PCF8575 is controlled via an I2C interface and features 16-bit quasi-bidirectional input/output pins. On the 3.3V level converter circuit board, if you don't solder the VCC-VDD pads, the PCF8575 level is 3.3V. If you solder it, the level will be equal to VCC Feature: Available library: PCF8575 Working voltage: 2.5 - 5.5V DC Working current: 100mA(MAX) I2C address: 0x20(default), can be modified by soldering A1 and A2 selectable pads. 16 individually addressable pins. Each pin can be configured for input or output The channel interrupt output pin is open for input change interrupt. Great for UNO R3 and other MCU to control simple relay, buzzer, button, led. Size: 4 x 2.1cm/1.57 x 0.83inch"