Traffic light with CD4017

For made a simply trafic light  you can use a CD4017 who is  Decade Counter with 10 Decoded Outputs. Also, it use CD4093 as tact generator.

For made traffic light must decoder module made with few diodes:

For 10 clocks, first 4 clock are used for green light, next clock is for yellow, next 4 for red and last clock is for red & yellow.

I use Live Wire software for simulate the circuit and put traffic lights drived by 4017 ver1 movie on my youtube channel:

Schematic from beginning of article are designed using older version of Eagle PCB software. Also, I design PCB for this schematic:

You can download PCB in pdf format: base circuit & decoder module !

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