Not enough Arduino Pins? Try this I2C Port Expander! | Chip Tips #1: PCF8574

[@Andy_Wells]

This is legitimately cool. One of my old coaching clients was hella into this stuff, and taught me quite a bit about electronics. He'd modded a few electronics/whitegoods in his home (his dishwasher to give it more options/settings, etc). Really really cool. -Andy

[@ouroboros.education]

Great video. These i2c expander are an awesome integrated circuit. For educational the pcf8574 is a good choice, but, if you are developing a product, search for more recent part numbers, I think the PCF of not recomendded for new designers. The TCA9548, for example, is a good choice. Nice video.

[@TerminalCuriosityEE]

Thanks for the great feedback! I agree, the PCF8574 is better suited to education than production. I mainly chose this because it suits an upcoming project I'm working on in the background

[@DisorderedArray]

The sx1509 is also I2C and has some very powerful features, but with the downside of using a QFN footprint.

[@onecircuit-as]

Great work, excellent tutorial and review! 👍😀

[@ismail_aydemir_youtube]

How do we set the pin addresses of PCF8574 as binary? I am trying to send from our serial. When I write 00001111, I activate the first four p0,p1,p2,p3, but it seems like this is not how it is done. Each bit seems to control a pin. Am I misunderstanding?

[@MisterkeTube]

Seems expensive compared to some mcu's ...

[@rajatbaria3096]

Are you Australian?

[@TerminalCuriosityEE]

Sure am!