ABSTRACT: With the contious development of science and technology,
promote learning science and technology, knowledge of the variety of
means. With a tool for Qiangda which has been widely used in all kinds
of knowledge contests occasions. But Qiangda is used for frequency, and
some production complex or low reliability, and because of the long-term
storage (electronic deevices) Qiangda for damage to the purchase of the
timelines of activities, The development will be affected, so this Qiangda
is designed. This design is six road Qiangda as the basic concept. Which
uses 80C51 microcontroller and extreal interface of Qiangda system, and
uses SCM time /countr timing and the number of mind Principe, the
software and hardware organically combined, which could allow the right
to conduct time. In Qiangda and which only begins after the Qinagda
only effective, if at the beginning of Qiangda before Qiangda invalid;
Qiangda limited time to answer questions and the time can be set in the
1-99 s; , right after the music keys tips; Qiangda time to time and answer
questions Dao ji shi, over time, the system automatically reset control and
mandatory reduction; keys locked in an active state, the key is invalid
illegal.
Key words: 80C51; alphanumeric display; Qiangda; time alarm
