How it works
The coop secure automatic door opener is intended to keep fowl safe from predators overnight.
It will open and close a vertically sliding door with a weight between 0.35 and 1.4Kg.
When it gets dark the door opener will lower the door by unwinding the string until it is slack. When there is day light the door opener will raise the door by winding up the string until it goes tight.
The light level at which the door operates can be adjusted.