This is an uncoupler system made for my Inglenook layout, used with an arduino to operate the servo.
The servo to use is a standard SG90 9G.
The height of the uncoupler is made to travel from under a plywood sheet of 10mm
Feel free to adjust the height if needed :)
You also may have to adjust the servo horn length if it is not standard.
Best Regards, Etienne Bonduelle.