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Discover an easy way to add more GPIO pins to your Arduino with the PCF8574 in this tutorial. We'll explore how it can be a handy alternative to other methods like shift registers, Max7219, and multiplexing. The video shows you how to control a single LED and a 7-segment display using the PCF8574, making it suitable for various projects. Plus, learn how to use expander pins for input and make the most of the interrupt pin. This tutorial is perfect for both beginners and those with some experience. Hope you find it helpful!

The link to the code can be found here:
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