How low pass filter works? Experiment with an oscilloscope 

Low pass filter, LPF. All flight controllers we use in RC hobby (FlightOne, Betaflight, INAV, Pixhawk, dRonin, and all the other) use low pass filters. What does a low pass filter do? It passes low-frequency components of a signal (below cutoff frequency) but attenuates high-frequency signal components (above the cutoff frequency). Since it's hard to make a visualization of this process with a software LPF filter, let's make an analog equivalent using a resistor and capacitor and connect all of that to a signal generator and oscilloscope. Yeah, science!
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