Looking at a new electronic shading system for my flat I was wondering how blind actuators generally work. I know they switch between the two phases (L -> down, L' -> up) depending on the 2-button switch.
But how do they know the end positions of the blinds?
Some motors detect the load on the drive shaft and "stop", but when I press the button I would still supply voltage to the motor? Or does the actuator detect that the motors stopped and internally also opens a switch so that no more power is supplied?