Description: Use AT89S52 microcontroller design and production of a countdown to show time and artificially adjusting the traffic light system. (Two), requires: 1. Basic requirements: (a) real-time display the current access time remaining (2) the need for remaining time display crossroads. What channel, south channel access time, red time, the green and the yellow light time to time expressed in seconds for the minus count (Time Custom) (3) countdown five seconds flashing yellow warning (4) can manually set the prevailing direction.
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交通信号灯.doc
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