The traffic light control system was designed using the ring shift counter as the sequencing device.
A photo-transistor is used to distinguish day and night. When you light a photo-transistor, the traffic light works.
Because the 10 Hz clock pulse is connected, the traffic light should blink rapidly when it is low. However, the MOD 10 is designed, connected and divides the frequency.
In the daytime, the intervals between the lights are longer. If it’s not illuminated, only the yellow light flashes quickly at 0.1 second intervals. This is because the ring shift register counter has been stopped.
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