A method and related apparatus used for controlling a peripheral device to transfer data to a bus. If it is estimated that driving load is high, the apparatus stops outputting information. The block body has a top light output surface and a bottom surface. The conductive layer includes silicon. A sealant on two workpieces smears onto the knurled surface when the bolt is inserted in a hole therein, but does not need to be removed. The height of the pole and disc is adjustable.