The PCAL6416A contains the PCA6416A register set of four pairs of 8-bit Configuration, Input, Output, and Polarity Inversion registers and additionally, the PCAL6416A has Agile I/O, which are ...
A while ago I received a couple of I/O port expander modules that use the I 2 C protocol. Using that Chinese module, you can use only the SDA and SCL pins of your Arduino, or any microcontroller ...
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