Abstract: A programmable window blind assembly includes a window blind device having a pull cord unit connected operably to a blind unit. A motor drive unit includes a bi-directional motor that has a drive shaft coupled to the pull cord unit such that rotation of the drive shaft can result in movement of the blind unit. A sensor unit generates motor rotation signals for indicating angular speed and angular displacement of the drive shaft. A programmable data storage device has blind position information stored therein. A processor controls the motor to operate in a first direction for moving the blind unit to a retracted position and in a second direction for moving the blind unit to an extended position.