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Based on the single chip computer as the core, to design A simple traffic light control system, set up A lane and B lane cross composition crossroads, where is A, B is A way. The design requirements are as follows:
(1) using light-emitting diode simulation of traffic signal lamp, two direction set respectively red, green, yellow three traffic light, with key switch simulation vehicle detection signal.
(2) under normal circumstances, A, B two lane in turn release, A lane release forty seconds, of which 5 seconds for warning, B lane release 25 seconds, of which 5 seconds for warning. A timing brand display intersection traffic conversion time remaining.
(3) in the heavy traffic, traffic light control system should be hand control switch, can change the state of artificial light, in order to ease traffic congestion. In the B lane release period, if A lane car and B lane car free, press the switch K1 make A lane release 15 seconds In A lane release period, if B lane have A car an