Servo Position Feedback

As we move a servo it would be more than nice to have a position feedback! The servo itself have a potentiometer telling the absolute position, but a standard Servo only have a 3 pin interface Power and Position setting – it gives no feedback. This is a common issue with many available actuators – lack of feedback.

In my case I want to use a power servo to turn four wheels and without position feedback I will be part blind as I drive. Or am I? I do not have the actuator position, but I have current feedback and know that high current usage is an error situation. Secondly I have GPS, accelerometers, magnetometers that will tell me if the vehicle is moving as expected then I drive.

That said – I am considering adding position feedback on the steering as well, but I will return to that later.

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