What's a reliable method of getting a clean measurement of the potentiometer in a hobby servo?
I've modified a servo for directly polling its position by soldering a wire onto its potentiometer's center lead, as described here. I then wired this lead to an Arduino's ADC pin, but I'm finding the readings to be extremely noisy even when the servo isn't moving. I tried using a moving average to smooth the signal, but even that results in jittery value.
Is this just the nature of a servo's potentiometer, so is there a better way to wire to clean the measurements?
Edit: By "noisy", I mean even when the servo wasn't moving, the ADC measurement taken by the Arduino could vary by ±50 units between readings.