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#49 MORE PINS PLEASE! PCF8574 Arduino Pin Extender (Easy)

Too few pins on your Arduino? Use this I2C controlled pin extender (with optional interrupt) to make life easier! All sketches and other stuff can be found here on GitHub: https://github.com/RalphBacon/PCF8574-Pin-Extender-I2C There are three sketches here, starting with the simplest one, an LED flasher. Well, an LED alternator might be a ...

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