Description: Countdown Timer Date: 2012-05 23:00 completed hardware: the single chip microcomputer AT89C51 8-bit digital tube function requirements: (1) basic functions: the starting number for 9999, use the timer every 1 second countdown. (2) extension 1: Using the button to set the starting number can be increased or decreased. (3) extension 2: Using the button control countdown to the start and stop.
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9999-2012-5-5-24\8只数码管显示多个不同字符.DSN
................\8只数码管显示多个不同字符.PWI
................\9999
................\9999.c
................\9999.hex
................\9999.lnp
................\9999.LST
................\9999.M51
................\9999.OBJ
................\9999.Opt
................\9999.plg
................\9999.Uv2
................\9999_Opt.Bak
................\9999_Uv2.Bak
................\Last Loaded 8只数码管显示多个不同字符.DBK
9999-2012-5-5-24
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