An electronic door lock is provided with a single control knob used for entering a predetermined combination through manipulation of the knob in a first arc of rotation, the code being entered by pushing the dial inwardly to bring a push pad into contact with individual ones of an arcuate array of electrical switches provided on a printed circuit board within the lock housing, the release of the door locking bolt being accomplished after entry of the predetermined code by further manipulation of the control knob through remaining portions of knob rotation which are unavailable until after entry of the predetermined code.