AT89S51 is used to make a manual counter, in AT89S51 P3.7 pin by one light touch switch, as button of manual counting, MCU P2.0 - Yin digital tube, P2.7 by one count as 00-99, according to single digits with MCU P0.0 - total Yin P0.7 by one digital tube, as 00-99 count ten digits display.

Packet : 3971018shuziyanshi_jishuqi.rar filelist
shuziyanshi_jishuqi.doc

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