I have tried to find the answer to this question, but I haven't been able to. I am pretty certain it is possible to run two servo motors off of one signal pin. The servos will both be powered with a separate power source (not by the arduino), but they will share the signal pwm pin from the arduino. This is possible, correct?
My second question is if I do this, is there a way to have one turn clockwise, and the other turn counterclockwise with the same signal pin? Turning to the same angle is fine, but I want them to turn in opposite directions.
You have not addressed the actual SIGNAL that the Arduino pin produces that causes the servo to move. When you analyze that signal, you will have you answer.
I assume you mean setting the direction that you want the servo to turn in code? I didn't know if it was possible to reverse the wiring or physically change something for one to change the direction it turned compared to the other.
What I mean is for you to understand what signal properties makes the servo turn one way and what properties make the servo turn the opposite direction.
I am using a library for my servo motor currently, and I have a basic understanding of what makes it change direction. However, I was hoping there was some physical/electrical modification I could make to the servo to make it turn in an opposite direction.
I have read that some brands turn in different directions from other brands with the same code. If this is true, I assumed there was some physical/electrical difference for this.
It appears this will be the best route, but I am running short on pins for the project. I am looking in to a port expander, but I wasn’t quite ready to go down that path. May have to sooner than later!
To use 1 pin with 2 servos, reverse the direction of rotation of one of the servos. That would require disassembling the servo to the point where you can swap the + and - wires to the feedback potentiometer.