An electrical control apparatus comprises a current sensor and a current inhibiting circuit that inhibits current flow between first and second terminals of a bicycle dynamo when current sensed by the current sensor is below a selected value. An electric brake device can be obtained by connecting the control cable and a brake mechanism of the cable drive device. The EMR absorption region includes a substantially regular array of silver or aluminum nanoparticles embedded in a matrix material. A clearance exists between at least one pair of adjacent polygonal cylinders. The bond pads which remain embedded in the encapsulation material are exposed on the lower surface of the package for connection to further conductors. The electronic unit is disposed on the carrying surface with a space formed between the electronic unit and the side edge of the display layer.