How to create a High-Pass Filter in Arduino

Oscar de la Hera Gomez
A flower that represents Arduino with the text "High-Pass Filter" beneath it.

Code for applying a high-pass filter to a signal in Arduino (C++).

A high-pass filter is a filter that allows values that fall above a cut-off frequency to pass, whilst attenuating (i.e. reducing the value) of values that fall below the threshold.

To create a high-pass filter, use code similar to the one below:

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