Description: AT89S51 microcontroller used to create a manual counter, in the AT89S51 MCU P3.7 pin by one touch switch, a manual count of the button with a microcontroller P2.0-P2.7 by one common cathode LED, as a 00- 99-digit display count, with P0.0-P0.7 microcontroller then a common cathode LED, as a 00-99 count in the ten-digit display
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00-99 key counter.txt
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