The invention relates to a novel pet ball launcher which uses a friction fit, scoop edges, and tuned tines or \u201cfingers\u201d which control the release of the ball and thus arc and distance thereof. When data refresh is to be carried out in a standby mode, the signal for selecting the way is maintained at an \u201cH\u201d level and is not reset to an \u201cL\u201d level while the corresponding upper address is designated. An arbitration module performs the dynamic arbitration. After a certain amount of time, multiple temperature measurements are successively carried out, and the temperature to be displayed is determined from said measured temperatures or an error message is generated.