Servo jitter…
I am using a Uno and a Sainsmart servo motor shield (for ease of landing servo cables) as an interface between an external source and the servo motors. The external source supplies analog signals for conversion to PWM to the motors. The Arduino is strictly an adapter from analog outputs on another device to control the servos. The servos twitch a lot…I tried various passive filters on the analog inputs, shielded cable and finally smoothing code from the IDE examples. 20 samples is an improvement on 10 and 40 even better but even at that one will twitch occasionally. I ordered ferrite cores but they have not arrived yet. My analog sources are rock solid and I am using a 20amp 5vdc supply for both the arduino and the servo motors. I do have all of the 0vdc points connected together. Should the Uno have a separate power supply?
any ideas???