Description: This design is eight way contest as the basic concept.Considering the time-limited answer according to need to set the function, using AT89C51 MCU and peripheral interface of the answering system, the use of single-chip timer/counter timing and counting principle, the soft and hardware combination, so that the system can correctly time, while the digital tube able to correctly display the time.Switching with the keyboard output, speakers in tips.At the same time the system can realize: the answer, only after the start of the answer is effective, if at the beginning of answer answer answer before the time limit is invalid question and answer time in 1-99s set can display which is effective and ineffective players answer answer keys, right after the music cue answer time and answer questions for inverted timing display, full system timing automatic reset and host a forced reset key lock, in effective state key invalid, illegal.
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Eight way responder.txt
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