STM32 Interfacing PCF8574 Pin Expander LED Sound Level Indicator Over I2C

[Useful Electronics]

Hi

In this tutorial STM32 MCU is used to interface PCF8574 Pin Expander over I2C to control 8 LED sound level indicator using only 2 pins. Both hardware and software are explained in details. All tutorial materials are shared in the GitHub Repository in the video description.