GPIO tinkering: 8 port expander
It's time to take a look at these PCF8574 GPIO expanded chips I pulled out of the mailbag a little while ago.
This isn't a deep dive, I'm just getting a bit familiar and trying them out with a few different microcontrollers.
Datasheet: https://www.ti.com/product/PCF8574
If you want to see another way of using this chip, Hari Wiguna made an interesting video a few years ago: • HariFun #133 - 8 LEDs, 8 Buttons, just 2 A...
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This isn't the only way to do it.
It's probably not the best way to do it.
But it's how I did it.