The design can accommodate four groups participating digital Responder, each set up a button for the answer in use. Responder has a first signal to identify and latch function, the button does not work in addition to the First Responder those outside set host " reset" button, after a reset of the host, began to answer in the first signal to identify the latch circuit Responder groups signal indicator, audio speaker 2-3s. Set the foul circuit, advance Responder and overtime answer (3min) groups whistle warning by the group show circuit shows foul groups. Set a scoring circuit, each group began preset to 10 points by the moderator scoring, answer time plus 1 minus 1, got it wrong once.

qiangdaqi.c

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