Description: design a tug-of-war game, can design a game of tug of war circuit. 2, circuit use 15 (or 9), light-emitting diodes, come only among a shiny, namely, the center of tug-of-war. 3, the game with a two button rapidly and continuously pressed, have a pulse, who by fast, Who bright spots on the move, every time, a bright spot in Mobile. 4, the party moved to highlight terminal diode, on the winning side, this time the two sides had no effect buttons, to maintain output, so after only bright spot reduction restored to the center. 5, digital Display won the bookkeeping. Teaching Tip : one, that the button signal input pulse signal every time the button should be able to effectively counter. 2, with reversible counter, plus or minus count input to receive two pulse signal, reversible counter to the
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