• Overview: A compact and efficient PCF8574 I/O expansion module designed to expand digital input/output pins using the I2C communication interface.

• Key Features: Equipped with the PCF8574T chip, featuring an I2C interface that allows controlling 8 bi-directional I/O ports using only two microcontroller pins (SDA and SCL).

• Applications: Ideal for Arduino and microcontroller projects, saving valuable GPIO pins when interfacing with multiple buttons, relays, or LEDs.