This lecture based on single chip set for the design of vies to answer first 8, required on eight different keystroke vies to answer first signal, and through the LED digital display corresponding pipe poems, vies to answer first success through the leds display. Design with two different plan, which plan by external 74 series a chip interrupt signal, scheme 2 by single chip microcomputer timer interrupt achieve internal vies to answer first.

8lu.txt

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