Introduction - If you have any usage issues, please Google them yourself
First, the design requirements: traffic light control system using single chip analog timer timing, so that the traffic light intersection
Alternating light and off, and LED digital display with time. To do with the 8051 output, control, burning off a dozen light-emitting diodes,
Simulated traffic light management.
Second, the design of content: This course is designed for the control of traffic light design, so to understand the actual changes in traffic lights and rules
Law. Assuming a crossroads for the north-south thing. What the initial state 0 is red, north and south light. Then things turn state 1
Red, green north-south traffic. Over time, turn off State 2 South Green, yellow light for 5 seconds, things are still red. Sub-state
State 3, the opening of something green, north and south light. Switch to state 4 over time, things off the green, yellow light for 5 seconds, north and south are still red
Lights. The last cycle to the state 1.
Note:. Two-color LED is a red LED