Smoothing analog sensor values

If the sensor value on your analog pin has some unwanted amplitudes, you can smooth it with some tricks.

smooth out sensor values

Tremors can come from fluctuating power supply, interference or a circuit inside the Arduino chip.

In this example, we simply take a portion of the new measurement and combine it with a portion of the value measured last time. The part of the old value is always a bit bigger than the new value and so the new value influences the measurement but we overwrite the tremor.