The system consists of three parts Responder unit, answer unit and alarm unit. The first time, the hosts set the answer time, and then once cleared switch, alarm sound prompt answer in start simultaneously the Responder latch module begins work Responder timer starts to count down, and time by decoding circuit in digital tube on. Within the stipulated time, players Responder Responder latch module on the player' s number latch, the other players the answer in invalid alert alarm timer to stop working, to answer in the time and the player' s number respectively through the digital display. When the prescribed time, and no one to answer in timer decrements to 0, and the decoder shows a 00, while the alarm alarm.

EDA—八路抢答器.doc

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