Description

Do you have too few IO pins, but do you have an I2C bus at your disposal? Then you can use this module to create more (standard) pins.
De PCF8574 works on both 3.3V and 5V. (output equal to input voltage)

Specifications:

Voltage: 2.5 - 6V DC
Jumpers present to set I2C address
8 extra pins per module
Pin can be used as input and output
Pull-up resistors for I2C bus already present
Possible to link multiple modules together for more pins (up to 8 modules)

For more info

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