AT89S51 Singlechip use to produce a manual counter, in the P3.7 pin MCU AT89S51 by one touch switch, the button as a manual count, using SCM after another P2.0-P2.7 total overcast digital tube, as a count of 00-99 single-digit display, with single chip after another P0.0-P0.7 digital tube were overcast, 00-99 count as ten-digit display

00－99计数器.txt

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