Abstract: A knocking activated device and method for operating an electromechanical device responsive to a control signal. The knocking activated device has a vibration transducer for generating a signal in response to knockings on a solid object. It also has a storing system for storing data representative of a predetermined sequence of knocks. The device further comprises a user operable interface for changing the data stored in the storing system. The device also has a comparing system for comparing the signal generated by the vibration transducer with the data stored in the storing system to produce the control signal when the signal generated by the vibration transducer matches the predetermined sequence of knocks.