Description: P1 port access 89S52 microcontroller with 8 LED, when the port outputs a " 0" , the corresponding LED light, P3.2, P3.3, P3.4, P3.5 respectively, then there are four buttons K1 ~ K4, press the button, the corresponding pin is grounded. Are prepared in water can be keyed light procedure, when K1 pressed, starts to flow, K2 is pressed to stop the flow, all lights are out, K3 mobile to light from top to bottom, K4 so that light flows from bottom to top.
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delay.txt
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