Category Archives: PCF8574

Adding pins to your Arduino using I2C and a PCF8574P chip

You are working on a project built around an Arduino and you realize you won’t have enough I/O pins to do everything? There are different ways of working around that limitation. One of them is to use an Inter-Integrated Circuit (I2C) bus and a PCF8574P chip. That chip will provide you with an additional 8 I/O pins at the cost… Read more »