In the design of hardware circuit, we should make full use of the experimental apparatus of the interface chip, such as the 8051, 8255 parallel interface chip, light-emitting diodes (red, yellow and green of the two). Miriam interface design or use of the existing single-pulse generator, but the pulse generator to generate negative pulse interruption, to simulate an ambulance through there.

有急救车的交通灯控制实验.doc

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