I'm measuring liquid volume using a flow sensor that outputs pulses 
from 1Hz to 16Hz.
    The uP measures the time between pulses and do a 32 sample majority 
filter. This type of filter gives me two different time constants, one 
when the frequency is rising and another when it is falling.
    I need one reading every second.

    Is there any better way of filtering those samples?
    How the filtering would have to be done with these type of signals?

    Thanks.
    Mark Jordan

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