Assume that you are moving towards a complex microcontroller project bundled with blinkers, beepers, and a display panel. To link a standard 16×2 LCD directly with the microcontroller, for instance ...
As there can be up to 16 PCF8574's on one I2C bus, this would allow to (in theory) control 16 HC4067 multiplexers over one I2C bus. The price of less pins used is performance as an I2C write is much ...
This library is to use an HC4067 multiplexer by means of a PCF8574 (I2C 8 channel IO). The HC4067 allows e.g one analog port read up to 16 different analog channels, or one digital port to read the ...
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