This code is useful to smooth noisy sensor signals. It does not use much memory. alpha is the smoothing constant which must be between 0 and 1. An alpha of 0.01 gives smoothing similar to averaging 100 readings. void loop() { raw = analogRead(sensorPin); average = alpha * raw + (1-alpha) * ave…

FYI: Exponential Smoothing:

system September 2, 2012, 5:23pm 3

It does work as described if you initialise the running average with the first raw reading.

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