Provides remote 8-bit I/O port on I2C bus.
On stock: 24
PCF8574A chip allows to have up to 8 digital inputs/outputs connected through I2C bus. Thanks to three address lines (which can be set to 0 or 1 via handy DIP switches), a single I2C bus can handle up to 8 such chips/modules. This means you are able to extend the number of Arduino I/O ports by 64.
Check out the examples of using this chip on our blog Starter Kit (not translated yet).
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