| 摘要 |
PURPOSE:To conduct counting in sports accompanying a change in court sides, etc. by replacing a count display by means of a plurality of multiplication counters counting the number of operations of an external switch and of a plurality of display selecting switch circuits. CONSTITUTION:When the sides of a court are changed, each of the sides A and B turns to disaccord with the display of the respective scores in a display unit 45. Then, a switch is depressed in order to make the former accord with the latter. By this operation, one pulse output signal is inputted from a switch circuit 33 to the terminal T of an FF circuit 4. As the result, the terminals (b) of display selecting switch circuits 35 and 36 and of selecting circuits 39 and 40 are opened in place of the terminals (a) thereof, the output of a counter 38 is impressed on the unit 45 via the circuit 39, a decoder 41 and a driver 43, and the scores are displayed on the right side of the display unit 45 and made to be in accord with the side A after the sides of the court are changed. The display on the left side is in accord with the side B likewise. |
