Abstract: An automatic drive unit for a door assembly of the type having a frame with an opening, a door positionable within the opening between an open position and a closed position, and a door actuator for moving the door between the open and closed positions, includes a controller circuit having a power source, a timing circuit for reporting the date and time to a processor, a non-volatile memory, a programmed set of instructions, and a display. The programmed set of instructions are adapted for receiving input of a location and open and close offset times, and storing such information in the memory. The controller circuit executing the instructions determines based on its location and the date a sunrise time and a sunset time, opens the door at the sunrise time plus the open offset time, and closes the door at the sunset time plus the close offset time.

Abstract: An automatic chicken coop door attachment may include a shell having an interior housing, an exposed area having a first section and a second section, and at least one inner wall. A track may be attached along the at least one inner wall. A lip may be attached to the shell and positioned in front of an end of the track. The second section of the shell may expose a door opening. A door may slide along the track. A motor may be mounted within the interior housing of the shell. A wire may attach the door to the motor. The motor may move the door between an opened position and a closed position. A cover plate may cover the motor and the first section of the exposed area of the shell.