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

In this first episode of Chip Tips, I'm diving into the versatile PCF8574 and exploring how it can be used to expand the number of I/O pins available to your microcontroller project. The video will cover how to wire it up, interfacing with I2C and example demonstration programs for both inputs and outputs.
Whether you're a beginner or an experienced maker, this video covers everything you need to know to get started with the PCF8574. Hopefully this can help improve your projects.
Code:
github.com/Terminal-Curiosity...
00:00 - Intro
00:31 - PCF8574 Background
01:44 - I2C Background
03:32 - Programming Outputs
04:34 - Programming Inputs
05:32 - Input Output Combo
06:46 - Interrupts
07:12 - Breakout Modules
07:45 - Conclusion
Buy me a coffee?
paypal.me/TerminalCuriosity

[@onecircuit-as]

Great work, excellent tutorial and review! 👍😀

[@MisterkeTube]

Seems expensive compared to some mcu's ...

[@rajatbaria3096]

Are you Australian?

[@TerminalCuriosityEE]

Sure am!

[@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.