Yes, because the curtain to be opened, to close, if the motor does not change the direction of the current, it will only run for a long time in a direction, so you must use the limit switch. That is, clockwise direction, stop, counterclockwise, stop, then go back to the clockwise direction.
It seems that this should be used to control the DC solenoid, how to use the limit switch.
I did not pay attention to how the power, but there is a so-called limit switch, is encapsulated in the motor (the motor is added to the shell, the limit switch is sealed with screw mechanism)
