Datasheet

Reading the feedback

The feedback signal is tapped off the position pot attached to the servo shaft. You can

connect the white feedback wire to any of the analog input pins and read the feedback value

using analogRead().

Calibrating the feedback

The raw feedback signal is a voltage. In order to convert that voltage into a meaningful position,

we need to calibrate it to the servo. By reading the feedback values at two known positions, we

can interpolate the expected feedback values for every position in between.

The following bit of code does just that. If you call "calibrate" in your setup function, it will

perform the calibration on the two points you specify. These servos operate over a range of

about 0 to 180 degrees. For maximum accuracy, you should choose the minPos and maxPos

calibration points based on the range of motion required in your project.

int feedback = analogRead(feedbackPin);

#include <Servo.h>

Servo myservo;

// Control and feedback pins

int servoPin = 9;

int feedbackPin = A0;

// Calibration values

int minDegrees;

int maxDegrees;

int minFeedback;

int maxFeedback;